Seems as though you can't get away from these calls.  Within a two month span I received 108 calls.  After sending complaints to the FCC and FTC without any assistance I contacted the Attorney General in NJ.  The calls stopped for a month and a half and am now receiving them again.  They are also sending mail now, hope it helps the Post Office out of debt .. company name is North American Power.

Here is North American Power and Gas, LLC website and some contact info. In case you want to let them know your displeasure.

http://www.napower.com/

Customer Service:
Telephone: Toll free at 888.313.9086 or locally at 203.893.4196
Email: customercare@napower.com

Representative Support:
Telephone: 888.313.9086 (option 3) or locally at 203.663.9799
Email: support@napower.com

Advertising & Sponsorship Inquiries:
For sponsorship and advertising inquiries, please contact:
L. Alexander
lalexander@napower.com

Press Inquiries:
Carrie Waible or Sarah Gentsch
Telephone: 212.379.4024
Email: napower@cwandco.com

Corporate Headquarters:
Twenty Glover Avenue
Norwalk, CT 06851
Telephone: 203.939.1155

Careers:
Telephone: 203.939.1155
Email: careers@napower.com

Yet another credit card scam.