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

https://fernandowehn083.timeforchangecounselling.com/if-i-delete-the-app-does-it-cancel-my-supergrok-subscription

If Apple billed your SuperGrok subscription, go to reportaproblem.apple.com to request a refund. Just canceling the subscription in iOS Settings won’t issue a refund automatically