Right now you're just spamming this section because you are not providing us with anything like the name of the miner, name of the company or individual, and screenshots of conversations or email communication, posting like this will not give us anything you have to provide us something that will prove your allegation, it's unfair for the people of Bulgaria if you cannot prove your allegation.
The people of Bulgaria have nothing to do with this.
Scammers can be found anywhere around the world.The nationality of the scammer doesn't matter.
I serial scammer would never reveal his real name and his actual location.This scammer is either an amateur scammer or maybe he's using a different name.
OP,perhaps you could just find a way to contact the Bulgarian police.I'm sure that they could track and find this Plamen Nenov from Burgas(if those are his real name and location).
Posting a scam accusation in this forum most likely won't solve your problem.