If you’d like a refund for Premium features in Core Shell / Core Tunnel, you must request a refund from Apple. You won’t be able to use Premium features from the App Store after your purchase has been refunded.
- Visit https://reportaproblem.apple.com/
- Sign in with your Apple ID.
- Click “Report a Problem” on the relevant Purchase.
If you have any trouble, post a topic or send @yang a personal message.