They called me multiple times so I finally answered and a lady with a thick accent talked after I had to say hello 3 times. She proceeded to say I got some grant from the government and then either she hung up or the call disconnected but they didn't call back after the disconnect. I guess it wasn't that important.
They've called several times today. I don't answer numbers I don't know. They can rack up your phone bill if you answer and get more info. They could get your name from your voice mail if your name is on your voice mail. They're relentless and annoying. Do what you can to protect yourself since the government clearly isn't doing anything!