Harassing calls, finds info through public profile then harasses your family.

I received this call from a collection agency on an old debt from 3 years ago.  They told me they were the Department of Investigations and that if I did not pay they were going to have me arrested today.  I checked and found out they were a Collection agency in Florida that had purchased this old debt.  They were extremely threatening and rude.  They would not tell me who they were or where they were located.

Identified themselves as investigation firm. Very rude and feel like this was for possibly collections or other devious reasons! Also tone was intimidating!