If Apple billed you for a SuperGrok subscription, visit...

https://domgodwinson38.gumroad.com/p/what-if-supergrok-isn-t-listed-under-subscriptions-but-i-was-charged

If Apple billed you for a SuperGrok subscription, visit reportaproblem.apple.com to request a refund. Cancelling the subscription on your iOS device under Settings > Subscriptions stops future charges but doesn’t automatically refund past payments