Not 2 BTC, sir. Just two transactions using BTC (both for $40).
From your last post I thought you said 2 BTC 🤣
Anyway, according to OP he paid you $70. It's obvious that you took the account back. In the mean time OP made two transactions using the account. It is complected now to find who is the bad guy.
The account is in your possession and only solution I see is, you need to refund him or give the account.
Also, the $70 you sent me was noted by exchange as "high AML risk" and was blocked. Just stop writing in this thread because even legendary forum members are tired of you
Words are not acceptable unless you give a form of proof. I do not think anyone is tired yet. 😉