Scratch that-
After posting I decided to click on my username and once again check on my acounts gamertag. (Note that i'm actually on a school computer not at my home computer which I usually use. Yes I know, I go onto halo wars forums whilst at school, I have no life etc etc)
So anyway I clicked on my gamertag and expected it to say I x JAXON x I but instead it had a big mesage saying would you like to display your gamertag and I had to click the box that said "I have read the terms and conditions"
Once I did, it refreshed the gamertag and now it is displaying correctly YAY! :D:D
So either you have to wait a looooooooonnnnnngggg time for it to ask you (months, and months) or try signing into your account on a different computer and checking your gamertag.
Hope this helps :)
"I'm a gamer, I have many lives."
GT: Famous Jaxx
56 out of 58 Achievements.
Leader: PoR/Forge