They call and put me on hold for as long as 10 plus minutes, if they do come on the phone, they will not explain who they are. They even hang up on me after holding for several minutes. I find them on the web, call the CEO, and he will not even take my calls. Emailed them, without any response. I am on VOIP, and can not use call blocker. How do I get these people to quit calling.