I can't access ME:LE because my account that is connected to steam got hacked

Around 2 years ago I played and finished MELE. Last year I got hacked on pretty much every account on pretty much every site I had connected my gmail/yahoo/steam accounts. It was bad, but I fixed up as much as I could.

NOW I want to play again and with mods, but I CAN'T because some bichass hacker with a hotmail account has replaced my MAIN LINKED steam account. I think it was from last year.

I need help with this please