Unable to register to envato because of bad themeforest username

I want to register to envato in order to access the forum
but as I try to register using my themeforest username,
it says that is is taken (of course: it’s mine!).
If i try to ask envato for a new password, it says that I’m receiving an email but nothing happens.
Anyone with issues like this?
thanks

Hi,

Reduce your name from envato market account from here

Thanks!