Some type of bill collector who lies.  They started out by saying that my ex husband won a cruise, when I told her she had the wrong number, she asked if I was (my real name) told her now, then she tried asked if I knew them, and I told her no.  The same people called my parents with the same setup.

I can only guess it is Sallie Mae as they have been trying everything to find my ex, and it's the only bill in collections in both our names.