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

https://technivorz.com/what-refund-reason-should-i-pick-for-supergrok-on-apple/

If Apple billed your SuperGrok subscription and you want a refund, visit reportaproblem.apple.com and sign in. Go to the iOS Subscriptions section, find SuperGrok, and request a refund there