I had a similar situation a couple years back-them calling from about 3 or 4 numbers daily. I rounded the numbers up and found someone in the local office who cared enough to help me and the next day the calls stopped.
I noted the date of your comment as of Aug 2014. Well, I've had this number blocked for about four months yet the robo parasite keeps calling. Never a message yet keeps calling every day. There should be a charge to them per call. I don't know who they are and I don't care. The amount of robo calls I have blocked fills the "missed call" log to the point that it mistifies me why they continue such a futile endeavor.
Hackers are hacking your phones and home PC . If PC has a land line connection in any way it is hacked now. Your smart phone same deal HACKED done deal first call you are hacked from that time forward. Factory reset only option then unlikely that you want be in the same boat in two days time. Change no.. Then reset .or firewall that is unbelievable good at keeping out spying hackers watching you ever second though your smart phone cam lens yes they can do that not only can they have already done it looking at you right now most likely. It is very real it is happening ever day all over this country. Up 150 percent in 12 mo. Time.The amount of Hackers have increased 150 to 1 if there's was 1000 5 years ago witch was lots more than that but easy to do the math with that no. Look at stats on net all thare this is a hacker I know for a fact it is think about that for a bit. Pedro Wood