Why wait two more days, if they have given you a bogus DCN number then you should take it to the forums now before others get scammed to, or are you worried about blowing any remote chances of getting some coins back if you do? To be honest if they have issued you with a fake DCN then they are actively conducting a scam or they have made a genuine mistake, so why don't you post something non accusatory on their vendor thread asking them for an explanation so you will at least alert others to a potential problem without damaging your chances of getting a refund if it was the latter scenario.