If Apple billed your SuperGrok subscription by mistake, visit...

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

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund. Go to Settings > your name > Subscriptions on your iPhone to manage or cancel, but remember canceling won’t refund past charges