Kathy, you might want to expand your complaints to the FTC and attorneys general, and then to the scam call source if possible. The absence of Telemarketing Sales Rule enforcement is a popular myth. The problem now is that cheap VOIP service and Caller ID spoofing were not available as tools of concealment to phone scammers when the DNC program was established. The FTC is well aware of this, and will be inviting ideas for a technological defense to be aired at the Autumn summit announced in July.
Agency Announces Robocall Summit to be Held October 18 in Washington, DC
My comments from two years ago in a thread linked below fills in some background, and the ''Stop Tom'' site gives you an idea of the current messy state of the problem with security gear hawkers.