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

https://blogfreely.net/samuel-wang09/h1-b-i-used-a-different-email-for-apple-id-could-that-hide-my-supergrok

If you want a refund for SuperGrok, first make sure Apple actually billed you by checking your purchase history or iOS Subscriptions. Remember, canceling the subscription won’t automatically give you a refund. To request one, go to reportaproblem.apple