You might want to stop posting stuff here about him unless it is new information that can actually leverage you with him to get your money back.
If I was a scammer and I read post after post after post about how fat I was and how unhappy you were I would be quite happy. Why? Because I could point to it and say "This guy is a nut. He thinks he gave me money (or he bought a product and like a crazy person, did not know how to use it and blames me now".
Instead, trace his assets. Hit him where it hurts. Most of these psychos have lots of little scams, crimes and what not going on and use their "legitimate" business to hide them. Find those scams. Find his undeclared money. Find people who deal with him IRL and talk to them. Don't talk to them like an angry person who got ripped off though, talk to them like a professional person who is just "doing business".
Also, If I were I scammer, I would read all this and say to myself "I bet this guy has another $5k to spend on someone who will help him get his money back" and then I would find a way to take $5k from you and seeing how fast you gave up more than that and how angry you are I am guessing it would be pretty easy to rip you off again.
Having done asset location and recovery work before, I can tell you that no one gets a cent until what is owed is recovered and no one can legitimately recover assets unless their is a court judgment against someone. So if I said to you "Pay me a retainer and then I will get your money back" then you would likely never see your retainer fee again either.
Sue this person. Stop posting stuff here. Get a judgment against him, then the Asset recovery people will find you.
(and no, I won't help you)