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

https://www.bookmark-zulu.win/if-apple-charged-you-for-a-supergrok-subscription-and-you-want-a-refund-go-to

If Apple billed your SuperGrok subscription, head to reportaproblem.apple.com to request a refund. Navigate to iOS Subscriptions, find SuperGrok, and choose the issue