If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to...

https://paxtonssmartperspective.cavandoragh.org/what-refund-reason-should-i-pick-for-supergrok-on-apple

If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to request a refund. You can also check your subscription under Settings > [your name] > Subscriptions on your iPhone