When using MyTriPro on an Apple device, your subscription will  be through the Apple App Store.

Apple Subscriptions

Apple handles all App Store transactions itself, we cannot view or modify- including refund -any in-app subscription if it was purchased through the App Store. You'll need to apply for a refund thru Apple at reportaproblem.apple.com.

If it says that you are ineligible for a refund, you will need to contact Apple support here: https://getsupport.apple.com/
Click Apps & Software> AppStore > Subscriptions & Purchases > Request Refund > Choose the Email Option.

If you encounter any issues, please send us an email at support@myswimpro.com