Can not log in, can not register, can not recover password

Hello :)
I used to play on this server before, when it was called Molten.

I had an account that was called "thesaka24" .

Now I understand that all accounts were deleted.
But still, I wanted to come back to this server and play again but I cant seem to register with my old account name.

When I try to, it says "That account name is already in use, try again."
When I try to recover my passwords, it says "The information provided does not match any accounts."

I was hoping I could get help from staff here, can anyone please help me get my "thesaka24" account up and running ?