I don't know why you want me to repay 0.6 BTC. It wasn't hacked by me, neither I knew it was hacked, neither we have proofs it was hacked. I don't have BTC now. Best I can do is send you 0.3 BTC in installments as I don't earn.
I will come online just once a week to payback installment, as I need to pay attention on studies more.
You passed off an account as being one that you had
proof of ownership to when you in fact did not have such proof of ownership. It would be one thing if you sold the account without a signed message and advertised that you had no reason to believe that the account was hacked but that is not what you did.