WOW!
Thank you all for your support!
Did several phonecalls to Horrormike! No answer.
Had a phonecall with my Bank here. They told me, I can demand my money back. But his Bank will not give it out, without consent from the owner. So it will not work.
With that answer from my Bank I was not satisfied and after further discussion and research she told me that I have made this transaction by SWIFT, thats a SWIFT-transaction and there exists some international rules for it.
So I have to go to my local policedepartment and "tell them the case" (sorry, I am not able to explain it better, because my english language). They will give me a for/confirmation, which I have to bring to my Bank. My Bank will than get in contact with the Bank from Horrormike. And it will not be so easy for him to explain what was going on, especially when I am not the only one who does that!!