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

https://wiki-global.win/index.php/How_Do_I_Confirm_My_SuperGrok_Cancellation_Actually_Went_Through%3F

If Apple billed your SuperGrok subscription and you want a refund, visit reportaproblem.apple.com and sign in with your Apple ID. Find SuperGrok under iOS Subscriptions and request a refund there