If you want a refund for SuperGrok, first make sure Apple actually billed you...

https://high-wiki.win/index.php/Apple_Refund_Portal_Not_Working_on_Safari_%E2%80%93_What_Browser_Should_I_Try_Next%3F

If you want a refund for SuperGrok, first make sure Apple actually billed you by checking your purchase history or iOS Subscriptions in Settings. Remember, canceling the subscription stops future charges but doesn’t refund past payments