Quote Originally Posted by Eden View Post
It could very well be that you are not dealing with AmEx, but a 3rd party debt collector. They tend to not take "really you are calling the wrong number" seriously at all... they figure you are just lying to them and continue their harassment..

That's what I'm thinking; it isn't AmEx at all. I've had this happen on way too many occasions, for people I don't know and the rudest of people on the other end. If you have caller ID, try plugging their telephone number into a search engine. Nine times out of ten the number came up in the search (along with an address) and I've filed complaints with the Consumer Protection division of the state's attorney general's office in my home state as well as the state where the collection agency is located. Haven't had any of those calls in a while.