Xbox gametag

I contacted microsoft support saying this: Hi today i discoverd that i was signed in with my brothers accout *** Die E-Mail-Adresse wurde aus Datenschutzgründen entfernt. *** and he had my gamer tag(I4lveI) so i tried to change it to his(vi11e) but on the website i accidentaly was inlogged with my account
and changed my name to vi11e after i Discoverd that i logged into my brothers account ann changed his name to the same name and it worked. I got back at my account trying to name it I4lveI but now i need to pay 10$ and i don't have that money so could you
switch my game tag to I4lveI

My answear was this: (https://microsoft-rtm.directly.com/index.html) Hi Alve! This is Julia, an Xbox gamer
like you and I'm willing to help you today. I hope you are doing good today despite of the issue you are having.

You can easily change your Xbox gamertag. If you want to change the gamertag that we created for you when you first signed up for Xbox (meaning you didn’t choose it yourself), you can change it one time
for free. After that, all Xbox gamertag changes cost extra.

If you created your own gamertag at signup and want to change it, you’ll be charged (fee varies by region and currency).

You can change it using this link:

https://social.xbox.com/changegamertag

What I would suggest is to proceed with the gamertag change and request a refund after that since it's accidental purchase.

So i bought the gametag and wanted to request a refound but i couldn't please someone help.

:)