when they call on my home number i tell them that i no longer have a car and i take the bus - then they go on for a few seconds about "so you dont have a car anymore" and i tell them no and then they pretty much just dont have a script for that...its pretty funny
when I get these calls, as long as they are calls from the STATES (not out of the country) I call them back. They legally have to have an option for you to unsubscribe from their calls, and be put on a do not call list. Hit 1 to be taken off list. Easy as pie.