lately, and I don't know why, when the calls come thru, on the screen it says, "fraudulent call".
I live in a condo, so all that they are selling, is taken care of by the condo board.
When I was in a house, and had electric, the oil companies would always call. I finally got fed up with it, and told them to come fill the tank. that guy walked around the house scratching his head to find the filler line. after about 15-20 minutes, he packed up and left. I sat still in the house with my husky/Shepard/terrier mix barking his head off. I did it a few more times, no one ever called after their first trip to my house. problem solved.