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

https://www.primary-bookmarks.win/to-cancel-grok-be-sure-to-stop-your-subscription-through-the-same-billing

If you want a refund for SuperGrok, first make sure Apple actually billed you by checking your purchase history or the billing info. Look in your iOS Subscriptions to confirm the charge