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

https://www.bookmarkingvictor.win/if-you-want-a-refund-for-supergrok-first-double-check-who-actually-billed

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