It was based on a free trial. I did not want this app
The app was based on a Free trial
iPhone 7 Plus, iOS 13
Question marked as
If you are on a free trial you have to cancel the subscription more than 24 hours before the trial expires, or you will be charged for the first subcsription period.
To cancel the trial or the subscription please see How to cancel a subscription from Apple - Apple Support
If it's a purchase rather than a subscription the same applies, but you will be charged the full price. Strictly speaking all purchases are final (after all, you can't very well return them): please see this page for information on requesting a refund: Request a refund for apps or content that you bought from Apple - Apple Support
However Apple have been known to be sympathetic in cases of actual error, so it's possible that they may allow you a refund as a one-off concession: but please be aware that they are under no obligation to do so: go to https://reportaproblem.apple.com/?s=6