Hi guys,
I've had some time to think about what has happend so far. Yesterday I felt anger towards mindrust and I said that my account didn't get hacked.
But it looks like it was definitively the case and I should thank mindrust for discovering that. Otherwise I could have lost it to a scammer.
So thanks mindrust!
It also doesn't make sense to contact Cryptios and waste his and my time. If I had done something fishy, I would have used a VPN.
The only thing I can do is signing a message with an old BTC address. I found an old post from 2013 with a BTC address in it and I still own the private key.
So what do you want me to sign?
https://bitcointalk.org/index.php?topic=195037.msg2201120#msg2201120I hope that helps to prove that I'm at least the person who opened the account in 2013. Someone could still argue that I know "SeW900" an that I wanted to sell my
account through him.

Think about that: 140 Dollars is probably a lot of money in some countries, but here in Germany it's nothing! 125 Euros? Seriously?
I could earn more by working during the time it takes to sell my account.
EDIT:
Message: I'm the real zackie!
BTC Address: 161sehE3mkW8owcE5Gt17ph2pvL1891K56
Signature: IO9Jpt4mf4H8UrI+lSCaL3wgO/ygylQyOWVDtDCIusCQYSAYKH5thX+HpbE5TbGCmDLtUEy9O99jSWr48z7R3WI=