I've been trying to book a Pay With Miles flight for three days, but every time I get to the end, it says my credit card does not match my address. Customer Service says it does match. The last Chat rep says this may be because either IE or Firefox is not up-to-date, so I've done that. I made a Delta flight with companion ticket on Friday and didn't have a problem w/ the credit card. NO ONE seems to be able to help me. Any ideas??