They've been calling me for weeks now. I finally answered today, and immediately asked to be taken off the list with out even hearing what the guy had to say. He said okay and I hung up. Hopefully this helps. I'll report them if they try to call again.
If you continue to get unwanted calls after registering with the do not call list, you can report it by calling the same number your registered DNC with. They will want the phone number, date and time of the call.