Who called from 3156750000

Got a call no answer and they hung up

I started laughing when he said he was from the government and he told me to "shut up" several times before I hung up!

I was told I was selected for a college grant based on XYZ factor.  I laughed and said I do lead a boring life. Suddenly, the man on the other end was hostile, telling me that I shouldn't be laughing, and then shouted "[***] You!" before hanging up the phone.

Received 3 calls so far. Did not answer

Did not answer. Several calls from this name/number past 2 days.