If Apple billed you for a SuperGrok subscription and you want a refund, visit...

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

If Apple billed you for a SuperGrok subscription and you want a refund, visit reportaproblem.apple.com to request one. Remember, canceling your subscription in iOS settings stops future payments but doesn’t refund past charges