Anyone who has an elderly parent should invest in call blocking. You can do a search on devices that cost around $40. Make sure you get one that will block area codes as well as individual numbers.
To block nu. add the nu the your phone and then block...they will call from a new nu. BUT! in time you will have all there nu. block..I have had peace...Now they start calling you. when you go to the doctor's. The doctor sell your name...