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

https://zulu-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—check your purchase history or iOS Subscriptions. Remember, canceling your subscription stops future charges but doesn’t refund past ones