how to refund a purchase

Hi there, you can go to https://support.xbox.com/en-US/help/subscriptions-billing/buy-games-apps/refund-orders

Here you sign into your account and then scroll down until you see your purchased item(s). Click request a refund on that item and follow the prompts. Make sure you submit it.

*The item may not be returnable/refundable after 14 days of purchase.

Hope this helps! Have an amazing day!

In case you find issues submitting the refund, you could contact our online support through Contact us | Xbox Support. Make sure to adjust the region of the website to the correct one before contacting. Oh and by the way, the refund department takes up to 72 hours to respond and the money takes three to 5 business days to go back to the account.

All purchases made using this glitch are being refunded, friend.

Regardless of how it was purchased.

I would contact to support directly, since its issue involving with your son.

https://beta.support.xbox.com/contact-us

Maybe try xbox support on the phone or if that doesn't work maybe try the game publishes support they might be able to help you with it.