To get a refund for SuperGrok billed by Apple, visit reportaproblem.apple.com...

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

To get a refund for SuperGrok billed by Apple, visit reportaproblem.apple.com and sign in with your Apple ID. Find your SuperGrok subscription under iOS Subscriptions, then select "Report a Problem" to request a refund