If Apple billed your SuperGrok subscription by mistake, visit...

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

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund. Go to Settings > your name > Subscriptions on your iPhone to manage or cancel, but remember canceling won’t refund past charges