Sucks you got the thin edge of the wedge, but really, there are bigger issues in life than drawing out the debate on this. Life is never perfect and neither is this situation but if you start losing sleep over it, whats going to happen when real stuff happens?
You've lost nothing, gained nothing and are right back where you were before you made the purchase sans a few posts and getting ratty (your words). Thats a whole lot of wasted energy talking about how you should deal with someone else and their business practices when you could just wash your hands and move on. Are you likely to pursue it? If so then probably less time talking and more time making hay while the sun shines. Otherwise... meh. It happens over the world. Take the hit and roll with it and not stress about it.