I had a similar problem in South Africa with a very unscrupulous Amiga distributor back in the days when the A600 had just been released. I paid him a deposit and he imported the machine for me.
Well I got jerked around because he sold me a US A600 with a HUGE homemade hashed transformer connected to the powersupply. I said I wanted a standard UK powersupply, he messed me around for weeks promising it had been ordered, and in the end I took the A600 back and paid him the difference on a B2000.
But there was a problem with the ROMs and manuals (some missing) and when I opened the machine I could see he had put old second-hand ROMs in there. The legs were bent and scratched, and there was non-standard kit in there. So then we played this same game of phone calls, excuses, empty promises, and in the end my patience ran out.
We paid a friendly visit to the guy one night when the whole family was there and said we would not move from the premises until a refund was given (for the whole setup) or the proper ROMs and manuals were handed over. No discussing, no physical stuff, just hanging around menacingly at the front door, that sort of thing.
The guy in the end opened a brand new Workbench 2.04 kit and I got the ROMs and manuals from that. Never dealt with him again.
In another incident involving a well-known electronics chain here in the UK, a friend of mine got a VHS that chewed the very first tape he played and then would do nothing but fast forward with any other tape. There was a weird smell of burning components from inside the machine. They took it back to the store and said 'It's busted, it chewed a tape, we want a refund or a replacement.'
The store lady said she was sorry but there were no more of those models left and she could give a replacement but not a refund since it could not be proved that the machine was not damaged by my mate's tape. He said tapes don't make components burn in the machine and wanted to speak to the manager. She said she was sorry but the manager was away on an important workshop and would they like the replacement machine (and offered him a unit that was less spec and cheaper than the one that died). Of course my mate refused and said he wanted the equivalent or a refund. She said he could only have one the same value or less, and as there wasn't one the same value left, he must accept the lower model.
Well, he walked out of the store and waited just outside on the pavement. Every customer who wanted to come into the store, he turned around, shouting loudly : 'Don't buy from XXXXXX, they ripped me off and won't give me a refund.' This went on for only half an hour, with about 8 customers turned away. All of a sudden the manager (who had mysteriously returned early from his course) appeared and offered my mate some tea in his office. My mate got a VHS twice the value of the busted one, and some biscuits and a very polite apology for his suboptimal shopping experience at XXXXXX.
A pity you don't have contacts near where this Binder is, 'cos it would be nice especially in a small town for a few chaps to carry a few signs saying 'Binder is a rip-off' or 'Binder is a thief' kind of like a picket outside his house.
You can't get done for that. What's he going to do, call the police? What's he going to say? If he says the stuff has been sent, you can show the police the receipts and ask Binder to track them. I think as long as Binder isn't personally inconvenienced, you guys will get nothing.
But if it was me involved, I'd be taking a little holiday to Germany and there would be a few sandwich boards made when I got there...