So what you're saying is that if I tell them I have bad credit or I live in Canada then my ten calls a week will go down? I wonder what's wrong with living in Canada? Dang, maybe I should sell out and move? And get rid of my landline!
Are you required to answer your phone in any way? Telepests love folks they can count on to answer their calls in any way, especially a live voice--mandatory for their survival. If you stop taking unknown calls completely and be patient, I'd venture to say you'd eventually cut back on the volume of junk calls you get. Numbers with no kind of answer are useless to them. It takes time and tolerating your phone ringing a lot, but it does work.