Recovering account after 5 years, Help pls.

[Demolisher]

Hi GM.

I use to play A3 mania back in 2009-2010 i dont remember exactly, but i left it after playing for a while, now i want to play again. I remember my username, Its Demolisher
and I tried to log in with it, and I can login into account. but when i try to do anything, I cant change my account password, or cant go into "change profile" option cos it says my current password is invalid. also I had mage in my account which got disappear. it says i got no characters on this ID. I tried to make new id, but it says only one ID is allowed per email and I already had this Demolisher id with my current email. I don't understand this, how can I login with my password and to change my profile or anything it says that my current password is invalid?.

For the love of god, help me. Cant wait to play a3 again.
Thank you.