I canceled my AMEX back in December and I was rejected this morning. I was told I would automatically be transfered to the new card since I am "an existing account holder." But I'm not! It's very frustrating, and no one seems to know what's going on.
I called Barclaycard. They said they received information from AMEX about who is an existing account holder, and they must not have closed my account properly. American Express then said my account is completely canceled and they haven't sent anything to Barclaycard yet and they won't until 3/21 (which I don't believe because this changeover can't happen over night). AMEX said Jetblue must have sent info to Barclaycard directly. Currently, I am trying that avenue... but I'm sensing that I will soon complete the circle.