He did the same thing to me. He said he was from the IRS. He curse me out so bad when i told him i was from the IRS which I am not. But they won't stop calling. I told them they have the wrong number,
In my experience, you can block the calls but they will pop up using a phone number from a different state next week. I haven't figured out how to stop them.
I get the calls 20 times today my room mate looked up insurance and when my wife answered they told her to f### off we are sure it is a scam and the number comes from modesto, california