1st off he is going out of business and ripping off as many people he can before he goes out of business. 2nd. He is a fucking asshole and doesn't know shit about running a business (even if its the black market) 3rd but probably most important is that his products are shit and you don't know what in the hell he put in them when he was mixing chemicals together.
I seriously doubt this guy is a chemist.
Take your losses and learn a lesson from it. Any body that treats his customers like shit can't be trusted.
All of my sources treat me like a customer in a grocery store. When I have issues they handle it very professionally. That isn't IP chinaman !