I'm in the same boat as you AZ, we get a lot of calls trying to sell us things, like medical alerts, etc. Late last year we had our roof done due to hail damage, many homes in the neighborhood needed to get that done. You can't believe the amount of jokers calling me saying they were in the neighborhood and just noticed I had roof damage. Well, after a couple of these calls, I started jumping on them, telling them I already had my roof done, and they were full of it. A couple actually had the nerve to knock on my front door, with an all-knowing serious look on their faces, while looking up saying there's a lot of damage from the hail on my roof. No more Mrs. Niceguy with these jerks, I'm so fed up!
We had calls from Comcast too, almost every morning like a wake-up call...only the phone didn't always say Comcast. Anyway, they were just trying to sell us add ons. When my husband finally talked to one of them, and said he just wanted the same deal we had on TV and internet that we had last year, which expires in April, they said they couldn't do anything like that.
Sometimes I look up these other clowns on the 800notes website, punch in their number and read all the other complaints about them, and add my own story. Some moron tried to tell me he was from the IRS, and I owed taxes from 2012. He said if I didn't pay him an amount in the thousands, a sheriff would come and repossess my car and home. I let him go on and on to see how far he would go, but there came a point where I just yelled at him that he was the one who needed to watch out because he would be arrested.
These calls come on my landline, which is an unlisted number, and I'm also on the do not call list. Don't know where these people get the phone numbers from, but it is super annoying and aggravating to be sure!