merged accounts, now i hate my user name

So I tried to link my poe account with steam and it worked, only problem was it chose the wrong account name to make as the main account on the profile. I made this account years ago as an edgy guy and now the better more "mature" name is is acting as a blank slate for me. I would love to see if either (A) I can make the other account on my profile the "main" one, or (B) get an account name change on its place? Thank you!

sure will thank you!