To get a refund for SuperGrok billed through Apple, go to...

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

To get a refund for SuperGrok billed through Apple, go to reportaproblem.apple.com and sign in with your Apple ID. Navigate to iOS Subscriptions, find SuperGrok, and request a refund