unwanted phone calls

Card Member Services continues to call me even though I'm registered on the Nat. DNC list. When I ask them to quit calling they hang up but often call back within the hour. When you call the number that shows on the caller ID...the number is out of service. They have a variety of different numbers they use to call from...all fake.
I have reported every different number that I have received calls from to the Fed. Trade Comm. (FTC) as well as the online complaint form in the DNC website. They have not been stopped yet but hopefully if enough complaints are filed something will be done. PLEASE EVERYONE TAKE ACTION and FILE a COMPLAINT.