I have Eventbrite on iPhone SE with iOS 12.1. In Eventbrite, a considerable number of old tickets for concerts and other events that are long past are shown, but (despite searching the Net for help) I cannot find a way of deleting them. Please advise.

I have the Eventbrite app and Wallet on my iPhone SE with iOS 10.0.3. I have booked a concert ticket in Eventbrite and the ticket has duly appeared in the app. In the app, 'Add to Calendar' is shown, but 'Add to Wallet' is not. So how can I show the ticket in Wallet? Thanks in anticipation of...