If Apple billed you for SuperGrok and you want a refund, go to...

https://smoothdecorator.com/how-do-i-cancel-supergrok-if-settings-subscriptions-is-blank/

If Apple billed you for SuperGrok and you want a refund, go to reportaproblem.apple.com and sign in. Find SuperGrok under your iOS Subscriptions, then select "Report a Problem" to request a refund