Who called from 2136403024

this number keeps calling me and leaves a message that there will be legal consequences if I don't call back and sometimes it leaves no message

I just got a call from this #. A man with an accent asked for me. I asked what it was regarding and he said he was from the US Grant Dept. I informed him that I had no grants and had applied for no grants and asked that he not call again. He told me to shut the [***] up and hung up on me. When I called the phone number back I got a recording saying that the number is not in service. This is a SCAM. I'm sure if I hadn't refuted his claim of being with the government he would have asked for personal info.

called and advised i have a 14,000 grant approved from the US Government.  I hung up

Received call from that number today.  They wouldn't say anything and I yelled into the phone and they hung up.  Caller ID only showed a number and not a business identification

I keep getting calls about every hour from these people but I do not answer.