If Apple billed your SuperGrok subscription by mistake, you can request a...

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

If Apple billed your SuperGrok subscription by mistake, you can request a refund at reportaproblem.apple.com. Go to your iOS Settings, tap your Apple ID, then Subscriptions, and find SuperGrok