Letter: Nagging calls a source of irritation

Reader Frank Danulevith writes about receiving unsolicited phone calls. Credit: iStock
What can I do to stop all these unwanted phone calls? I've put my phone numbers on the "do not call" list, but it seems that I am receiving more calls now than ever.
I get an average of five calls a day for home-alert systems and to lower my credit card rates. There has to be a way to avoid these calls.
I know I'm not alone. Is there something I can do other than turn off my phones?
Frank Danulevith, Massapequa Park