They claim to be Source 1 Financial or Guardian Financial and their number is 2092457422. If you look up the number online you will find that the scammers try to use legit companies to scare their targets. When I asked them for there address they said they were located at 1741 Newnan Crossing East St Suite 0 which is a strip mall in Georgia. Looking at the storefront, there is no Source One Financial located in the strip mall. (Unless they are on isle two of the Kroger store located there.)
When you call they are very nasty and evasive and immediately try to prove they are a legit company. However, getting simple names and extension from the seems to set them off. And of course, if the number you call them from does not match up in their database (of potential victims) they will hang up on you.