I used their credit card obtained from Express, one time, paid it in full and cancelled my account. Last week I received another credit card with a different number than the one I had before. Called the 800 number and when I was asked by the automated system if I wanted to cancel the card to press 2. I did so and the voice kept on giving out a list of options to reach in customer service just like I hadn't clicked on 2.
When I went to Contact Us, I too was asked to supply my credit card number and my social security number. No way man, was I going to give them that information. Since I don't seem to be able to cancel the card, I'm going to destroy it and not reply to any of their mailings.