I asked an Xbox support contact using live chat about this, and they sent me a link to this page.
I was wondering if you could change my gamertag since it has my full name in it (Kuba is an abbreviation for Jakub) which i do not think is very safe. I dont have enough spending money left to pay for a change, so if possible, could you change it for me? Or make it so I can change it from my console?
Sorry for the trouble I just do not want to play on public server with my full name shown to everyone.
If it is possible for you to change it for me, I will add a reply with a name I think would be more appropriate.