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

https://telegra.ph/SuperGrok-Not-Showing-in-My-Apple-Subscriptions-List-Heres-Why--How-to-Fix-It-08-01

If Apple billed your SuperGrok subscription by mistake, visit reportaproblem.apple.com to request a refund. You can also manage or cancel subscriptions in Settings > [your name] > Subscriptions on your iPhone