How to change the color of frame in code using an ItemTemplate in Code

Hello, I'm fairly new to Xamarin and am trying to add a feature that changes the color of a frame based on whether a ticket was valid or not, however I've ran into difficulties trying to make it change dynamically. I've created my listView in ItemTemplates in Code, and when I try doing a binding of string label with error codes, upon trying to access the value using statusLabel.GetValue(Label.TextProperty).ToString(); I get a null exception, even though when the application runs, the text does show up.

I've tried multiple things, including iterating over the children of the listview, but I can't seem to change the value because it is configured in the ItemTemplate. I also tried creating a method within my template class that would change the color value, but nothing has worked up to now.

If I remove the "statusLabel.GetValue(Label.TextProperty).ToString()" calls, the app runs and displays the initial black color used to initiate the statusColor variable, but I don´t want them to be black, but rather change color based on the content of the statusLabel or some other way.

Any suggestions would be greatly appreciated, here is my code thus far:
and thank you in advance.

```
//Gets the tickets and adds them to the listview
private Task RefreshListBookedTickets()
{

        System.Collections.Generic.List<TextCellItem> ticketList = new MenuData(); 

        return new Task(() =>
        {
            try
            {
                var tickets = Helper.ReauthIfNecessary(() => App.GetRecentTickets(App.Bearer));

                Device.BeginInvokeOnMainThread(delegate
                {
                    foreach (Ticket ticket in tickets)
                    {
                        string status = RefreshStatus(ticket);
                        //Color statusColor = getStatusColor(ticket);
                        //App.Logger.Debug("RefreshListBookedTickets - Ticket Status:" + statusColor.ToString());

                        ticketList.Add(new TextCellItem
                        {
                            dateText = ticket.StartTime.ToString("MMM dd, yy"),
                            timeText = ticket.StartTime.ToString("HH:mm"),
                            cityText = StaticZoneInfo.getZoneNameFromID(ticket.MandantId.ToString()),
                            durationText = "   Min: " + ticket.Duration,
                            ticketStatus = status
                            //ticketColor = statusColor

                        }) ;
                    }

        // Create stacklayout with listview
                    var content = new StackLayout
                    {
                        Margin = new Thickness(20),
                        Children = {
                             new Label { Text = "My tickets", FontSize = 14, TextColor= Color.Black,  },
                             new ListView { IsPullToRefreshEnabled = true, ItemTemplate = new DataTemplate(typeof(ListTicketView)), ItemsSource = ticketList,               Margin = new Thickness(0, 20, 0, 0) }
                        }
                    };

                    MainGrid.Children.Add(content, 0, 1);

                });
            }
            catch (ApiException e)
            {
                App.Logger.Error("BookingPage - RefreshBookedTickets - API Exception(" + e.ErrorCode + "): " +
                                 e.ErrorContent);
            }
            catch (Exception e)
            {
                App.Logger.Error("BookingPage - RefreshBookedTickets - Exception: " + e);
            }
        });
    }

//gets the string code value
    private String RefreshStatus(Ticket ticket)
    {
        if (ticket.Error != null || ticket.Error != Ticket.ErrorEnum.NONE)
        {
            return "Error";
        }

        if (!ticket.DeliveryConfirmed)
        {
            return "Pending";
        }

        if (ticket.EndTime > DateTime.Now)
        {
            return "Valid";
        }

        return "Void";
    }

//The itemTemplate
    private class ListTicketView:ViewCell  
    {

        public static Color StatusColor { get; set; }

        public ListTicketView()
        {           
            var grid = new Grid();
            var statusLabel = new Label();

            statusLabel.SetBinding(Label.TextProperty, "ticketStatus");

            StatusColor = Color.Black;

            if (statusLabel.GetValue(Label.TextProperty).ToString() == "Valid")         // <-- Causes Null Exception
            {
                statusColor = Color.Green;
            }
            else if (statusLabel.GetValue(Label.TextProperty).ToString() == "Error")    // <-- Causes Null Exception
            {
                statusColor = Color.Red;
            }
            var frame = new Frame
            {
                HeightRequest = 40,
                WidthRequest = 40,
                CornerRadius = 20,
                VerticalOptions = LayoutOptions.Start,
                HorizontalOptions = LayoutOptions.Start,
                BackgroundColor = StatusColor,
                Margin = new Thickness(10, 0, 0, 0),
                Padding = 0
            };
            var dateLabel = new Label 
            { 
                FontAttributes = FontAttributes.Bold,
                FontSize = 17,
                TextColor = Color.Black,
                Margin = new Thickness (-20,0,0,0)
            };
            var timeLabel = new Label
            {
                FontAttributes = FontAttributes.None,
                FontSize = 14,
                TextColor = Color.Black,
                Margin = new Thickness(-20, 0, 0, 0)

            };
            var cityLabel = new Label
            {
                FontSize = 17,
                TextColor = Color.Black,
                HorizontalOptions = LayoutOptions.Center,


            };
            var durationLabel = new Label
            {
                FontAttributes = FontAttributes.None,
                FontSize = 17,
                TextColor = Color.Black,
                HorizontalTextAlignment = TextAlignment.Center };

            dateLabel.SetBinding(Label.TextProperty, "dateText");
            timeLabel.SetBinding(Label.TextProperty, "timeText");
            cityLabel.SetBinding(Label.TextProperty, "cityText");
            durationLabel.SetBinding(Label.TextProperty, "durationText");


            grid.Children.Add(frame);
            Grid.SetRowSpan(frame, 2);
            grid.Children.Add(dateLabel, 1, 0);
            grid.Children.Add(timeLabel, 1, 1);
            grid.Children.Add(cityLabel, 2, 0);
            grid.Children.Add(durationLabel, 3, 0);

            View = grid;
        }

    }

    private class TextCellItem
    {
        public string ticketStatus { get; set; }
        public string dateText { get; set; }
        public string timeText { get; set; }
        public string cityText { get; set; }
        public string durationText { get; set; }
    }

    private class MenuData : List<TextCellItem>
    {
        public MenuData()
        {
        }
    }

```