If Apple billed your SuperGrok subscription and you want a refund, go to...

https://record-wiki.win/index.php/How_Do_I_Stop_SuperGrok_from_Auto-Renewing_on_iPad%3F

If Apple billed your SuperGrok subscription and you want a refund, go to reportaproblem.apple.com and sign in. Choose iOS Subscriptions, find SuperGrok, and request a refund directly there