If Apple billed your SuperGrok subscription and you want a refund, visit...

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

If Apple billed your SuperGrok subscription and you want a refund, visit reportaproblem.apple.com and sign in. Choose iOS Subscriptions, find SuperGrok, and request a refund there