I have been dealing with these creeps as well.
I sent them the letter for being non-licensed in my state and they never replied until today. Got at call at work (violation of Federal law) and the guy, a Mr. Paul Miller, stated that state law does not apply since they are based out of Costa Rica (thought they were Delaware). I told him that since he was in violation of Federal and State law that he needed to take the matter up with my state attorney general and get back to me in writing if he was indeed legal to operate in my state.
Well the dude threatened to call my family, friends, work etc. cussing me out all the way. I hung up on him and he promptly called back. The receptionist told him I was busy, during which time the head of the HR dept picked up the wrong line by mistake and he cussed her out. She knows the law pretty well and knew this guy was up to no good so all it did was make her want to reach through the phone and draw blood.
Not sure if he will call back again, but if he does he will get the same response. This outfit is very illegal and bad news. Stay away or get out of dealing with them as fast as you can. They have no regard for the law whatsoever.