Gamertag Hacked Required Revert and new change allow

Hello, first it's a pleasure to be able to help you today.

My name is welcome to the community.

Hello OverloadedTech, I'm glad you recovered your account, but unfortunately the support can not offer you a free exchange of Gamertag, the exchange and the charge are made automatically by the system.

https://social.xbox.com/changegamertag

I just solved i no more need help

Hello again, unfortunately the support or can not offer you a free exchange, and with this the exchange of the Gamertag will be automatically charged by the system.

Ok, but i must pay the change fee

Was the gamertag changed to one of MS standard random gamertags or something specific (even by accident)?

In the first case it may be due to an enforcement action. I would suggest to check that out first: https://enforcement.xbox.com (sign in with your son account
there).

If that was not the case, there is no revert option on gamertag changes as far as I know, so going back to the previous one would be considered a new change. Only the first change is free, so if he has already used that one, the second
should always require your permission since it would require a purchase.