@Reyser Can i change my username than?

Hello,
i want to create a new account to upload my mods but i keep having a troubleshouting that i can't create a account.
https://prnt.sc/txd2qh
^^ message i keep getting.
I have send multiple mails about this but no one reacts....
Does someone have a fix for this?

P.S: Sorry for my bad English i'm Dutch