To get a refund for your SuperGrok subscription billed by Apple, visit...

https://wool-wiki.win/index.php/SuperGrok_vs_X_Premium_%E2%80%93_Are_They_the_Same_Subscription%3F

To get a refund for your SuperGrok subscription billed by Apple, visit reportaproblem.apple.com and log in with your Apple ID. Find SuperGrok under iOS Subscriptions, then select “Report a Problem” to request a refund