For those of you being harrassed, this website is GOLD re: getting rid of overzealous and illegal collectors (for instance, they can't come back to you 20 years after certain debts etc.).
Once on the website, Clark Howard has a ton of very helpful links to gov't agencies dealing with this sort of stuff.
They thought I was someone else and thought I was lying when I told them that I had no idea who it was that they wanted. They told me that I was listed as the "emergency contact" but I didn't recognize the name they gave me. They have called every day for the past week until I answered today.