If you want a refund for SuperGrok, first double-check who billed you—sometimes...

https://delta-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 double-check who billed you—sometimes it's Apple directly. Look in your iOS Subscriptions to see if it’s active. Remember, canceling the subscription stops future charges but doesn’t refund past payments