I got one too

I (actually a co-worker) received a recorded message from Vandenberg and Associates and I have no clue what they want. They left a file number on the message. I called the number back and a very rude woman asked if I was one person or another. I asked her why she would ask me that and she told me that we both came up under the same number. Weird!! She then demanded that I give her the last four digits of my ssn. I refused to do it and she got hostile with me. She told me that I was in trouble with the law and that if I did not want to handle my responsibilities that she was going to terminate the call and I could meet my fate. I told her that I thought she was a little rough and that there are many scammers in the world and how did I not know that she was one of them. She told me that I obviously did not want to resolve my issues so she was terminating the call. Oh Well!!! Number one...I don't have any unpaid debt. Number two...if she really wanted to collect a debt you would think that she might have been a little nicer. Should I be worried?