You know that emailing our law enforcement ain't going to help you much further, you will probably hear something like:
We may not give out any further information related to this. Once the servers are checked and the servers are clean from illegal activity, we cannot give you anything back for legal reasons...
unless you want to spend enough money, get a lawyer and fight against it (which probably takes longer than getting them back probably), you can't do anything.
The dutch police is way to ignorant for this.
(and I can tell you I am a citizen out of the netherlands)
The police in those bigger cities such as but not limited to The Hague are way straight to the point then for example in my country...
The are also alot of different in handling things than they do in my city
Well I hope you get it back ASAP.
Let's hope for it.