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

https://www.logo-bookmarks.win/if-you-were-charged-for-supergrok-and-want-a-refund-first-double-check-if

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