I think this is the same call center that Cynergy Health has. I keep removing myself from their call list as their answering machines states, but oh, they call me back from another number.
I agree with you. I filled out a response email for Cynergy with my phone number and I got 10's of 100's of calls for the following week!
It was the same number for a while, however now I am getting calls from random numbers, and they just hang up if I pick-up.