Unfortunately since this website is not affiliated with the caller who is pestering your Grandmother, your complaint here will have no effect. Your best option would be to purchase her a Call Blocker and program in this number and any others who are bothering her, especially if there is no way to directly tell the caller to stop or no way to send them a Cease and Desist letter via Certified Mail, Return Receipt.
DO NOT CALL CELEBRATING 10TH YRS. I HAVE BEEN ON THE DO NOT CALL FOR YRS. BUT I KEEP GETTING THEM. LET'S SEE, ABOUT 5 CALLS A DAY X7 IS 35-40 A WEEK. PISSES YOU OFF. I WILL TRY DO NOT CALL AGAIN. THEY CALL AND WILL NOT TALK OR IF THEY DO IT IS ALWAYS AN EASTERN INDIANS.