How do I change my name on Giant Bomb?

I have change my XBL gamertag but I can't figure out how to change my name to the same on here? None of the achievements etc have updated since I changed it :s

you will have to remove the old XBL account and add the new XBL account (with your new name) on Giant Bomb.

" You have 1 post just make another account with the name you want... geeeez it's not rocket science. "

" @MissCherry_13: You can't change your user name. "

I think you guys should actually read her post instead of answering based on her title.
 
@MissCherry_13:
 Go to manage your accounts on the achievement tab. Remove your previous name and then add your new new name.

" @JJOR64:@L1D3N:@dbz1995: She/he is trying to change the gamertag that is linked to their Giant Bomb account. They changed their Gamertag on XBL and need to update it on here. "

" I think you guys should actually read her post instead of answering based on her title.
 
@MissCherry_13:  Go to manage your accounts on the achievement tab. Remove your previous name and then add your new new name. "

Thank you guys, will go and do that now :)