My husband and I used to have an Am.EX. credit card.This account has been closed for the last six months.We started getting calls this month from Allied Interstate and they are saying we owe them money on this card. We gave them 48 hours to provide proof if we owe anything. They have not done so. We have tried calling them back with the Dallas phone number and the 1-800 number and no one will answer the phone calls. I noticed that somebody found a fax number for Allied Interstate and I am going to try it today. It makes me feel very uncomfortable to know some scam artist has both our home phone number and cell number and is trying to rip us off financially.