When searching online for a way to stop these calls, I found a do not call service at 307-223-0458 which was actually for 201-243-3429 but I called anyway. It turns out they have this caller's phone number also on their list and was able to help me stop these phone calls. All they need is the caller's phone number to check it against their list and the receiving phone number to add to the do not call list.
 May 23rd, 2013
Received 2 calls from this number in past 3 days. Caller ID says "Rebate Dept". But I haven't submitted any rebates in ages. When I pick up, no one answers. I think this is a sales call (spam) despite fact that I am on Do Not Call lists.
 May 23rd, 2013
no one on the line when I answered
 May 21st, 2013