To get a refund for SuperGrok billed by Apple, visit reportaproblem.apple.com...

https://www.adirs-bookmarks.win/if-apple-billed-you-for-a-supergrok-subscription-and-you-want-a-refund-visit

To get a refund for SuperGrok billed by Apple, visit reportaproblem.apple.com and sign in. Navigate to your iOS Subscriptions, find SuperGrok, and request a refund there