I bought keyless entry system from www.BmwSecuritySystems.com. The system doesn't work after installing it according to the manual. I have had minimal support from the seller and what I did have amounted to saying that there must be some modification in my car's OEM security system, needless to say there is none. I asked the seller either to try and help to resolve the issue or return my money but I haven't received a reply in over a week.

Is there anything I can do? Can I raise this with some authorities, BBB perhaps? It's not so much the money, about 150 USD, I can let that go. But I want at least to have the satisfaction of paying back the SOB that sells these BS systems.