@MojangSupport this account migration is bad. I already had a Microsoft account with the email I used for my Mojang account. Now since the migration I have a stupid username and can’t change it. So now if I make another account to have my name back do I have to pay again?

Are you sure that you're not looking at your Microsoft Gamertag, vs the username you'll see when you're logged into the game? ^TK

Yes it changed my name on Minecraft when signing in because I already had a Microsoft account on that email