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

https://alpha-wiki.win/index.php/What_Is_the_Exact_Site_to_Request_a_SuperGrok_Refund_from_Apple%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