Harassing calls from liars

They call non stop on 3/22/18 I was told that they have over a 1000 numbers to use. I bet that all of the people having a similar problem have verizon because they released their customers to telemarketers but they deny it. I received a letter from them saying that they were going to and they sent a do not call registry number that was really a diabetic testing supply so calling it gave them permission to call or sale you number which they did