Who called from 3477752694

Got my 3rd or 4th call from this number - since I use Call Control and blocked this number after call #1 - they don't disturb me. However, am grateful to Sue & Nick for the background of who is calling and what scam they might be up to. Thanks!

[***] call me one more time and I will find you and your family and kill every last one of you!

I keep getting calls from this number. I have answered the call and no one on the line?
I can not block from my old cell phone. I am on our states no call list.
They never leave a message. I no longer answer call, from numbers I do not know, but this is
a real pain.

Same message being robocalled from 516-218-8797, "Debt Free SRVC."