If Apple billed your SuperGrok subscription, you can request a refund at...

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

If Apple billed your SuperGrok subscription, you can request a refund at reportaproblem.apple.com. Just sign in, find your purchase under iOS Subscriptions, and select "Report a Problem" to explain your issue