I had this problem back in the day when SE was looking to make money. Because the credit card number was the same it wouldn't take that number again as a valid option with a new expiry date. I had to phone them and get them to manually change the expiry date and things went on as usual.

Since then I have had to phone them for payment issues (adding another account) and they basically said they are no longer interested in helping people give them money so good luck. lol