Same boat - I get a minimum of 2 calls every day; choose option to add to Do Not call List - nothing. spoke to "AGENT" 6 times and when asked to be added to do not call they hung up each time - still receiving calls daily. All calls are 610 area code and then start with a "0" or "1".
I now take every opportunity to answer and choose the option to speak to someone and verbally abuse them. I know it wont do anything, but until we can confirm who is calling it gives me some self satisfaction.
It may be Great American Power operating out of Pottsville PA - 877-215-4140.