Xbox name

when i created my account for the first time it wanted to to make a name but i was only able to select 3 weird options, when i tried to type my own in game name the "complete" button would grey out, even if i added or removed a single letter to the suggested
names. now im stuck with GoLuckyCrown and some digits when i wanted . now they want to charge me 10 euro's for a name chance even though they wouldnt let me choose my own name aside from the 3 weirdass name suggestions.

:)