Kill the call before they get an automatic answer to solve that if you can. No kind of answer, no way to threaten you, or anyone. Works well for warding off unwanted callers after a while.
Screen calls. This # left a vm claiming to be the IRS awaiting my call back. After seeing the news and checking the # via this site, I believe it is a fake IRS scam attack.
They called me with a recording, saying that they were the IRS and federal arrest warrant had been filed against me. Also that I needed to call them back to speak with one of their special representatives to avoid being arrested. Called back to give them a piece of my mind and no one would answer.