http://forums.khinsider.com/foyer/148829-username-change-request-thread.html
Just follow the instructions in here. I should add that name fixes are completely free (what you're asking for), but overall, don't expect to see the change right away.
Just follow the instructions in here. I should add that name fixes are completely free (what you're asking for), but overall, don't expect to see the change right away.