I talk with them. Ask them to hold on a minute, just set the phone down for 30 seconds, talk some more, ask to hold.... The goal is to waste their time enough that they take you off the list. Tell them no real information. This can work with scammers from India as well. Yes, my credit card interest is high. Yah...wait, my number is 1234 5689 9012 and the expiration date is 03/19. What? My card is expired? Oh My God! What am I going to do? Can you help me here? I have all my bill pays on that card.... (actual conversation I had with some Indian guy for 25 minutes till he finally figured it out, swore at me and hung up).