Got several call I called back and they can't say there there name right I called back told them to stop calling me

I would like to know if you received any money from this company.

The caller said I was chosen to receive a grant of $6,700, that I could use in anyway I would like. He said I was to go and buy a Green Dot Money pack for $104.95 and that it could be purchased at 7-elevens. I did that and then he said that I needed to send him more money, which I did not have. He insisted that I could go and borrow more money from family, friends, whomever. I hung up on him. He called back and I hung up on him again!

I am elderly and my son walked in just before I hung up. The company was identified as U.S. TREASURY GRANT DEPT.  My son insisted to the caller to tell him what the charges would be. She could not give an answer. Referred him to the provided call back number. After we called, still could not get an answer. SCAM INC.

I heard my mother-in-law talking to someone on the phone and from what I heard just didn't sound right. I sat and listened and when she hug up I asked her what it was about. She said people from the U.S. Treasury Grant Dept. wanted to send her $8,400.00 and all she had to do to get it was send them $200.00. I told her it was a scam and asked if she gave them any personal information, she said she gave them her checking account number. We called the bank to inform them of the situation.
Here are the names of who she talked to: Florence Peroy (female), Oscar Willson (male) both sounded Asian.