so i bought a steam account that has csgo from playerauctions, but we made the transaction with paypal directly without going through playerauctions middleman system, it went well but after 1-2 months the account was recovered by him somehow, maybe he contacted steam support and provided them with his first email to prove the ownership, i don't know the first email, and the weird thing is i still have steam guard mobile authenticator but when i try to recover the account with the codes it says invalid and i tried to enter the recovery code but no chance.
the account has a skin on it that i really want and i think he can't trade it in the next 7 days so i gotta be quick.

I would appreciate it if someone can help me out

Regards.