Question about Outlook Express

We were notified that Windows Live Hotmail Plus service(s) email is trying to bill our credit card - which recently changed.  However, it is requiring we get a code and/or update the security in order to go on to the billing.  SO, we did - only the email it goes to no longer exists.  How can we get someone to help us get this fixed.  When we went in to update the email it says there is a 30 day period before you can do anything - in the meantime our service won't be able to get billed.