As you write, in Dubai, they do nothing, and what do you think the German police will say when you come to︀ them explaining it’s for a service in Dubai where you’ve tried to set up a︁ company or whatever you’ve paid for?
They’ll just laugh at you and tell you they︂ have better things to do. You’ve dealt with a company in Dubai, not a German︃ one. Forget your silly threats; they’re pointless and just make you seem foolish, sorry.
Your only hope is to get in touch with our friend Fred, or you’ll have to︄ write off the money and use the other good advice you’ve been given here in︅ the thread. That’s how it works in a world where you’re trying to achieve maximum︆ tax freedom.