Hi my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.
are you able to sign in to aol
login to www.aol.com
click on manage my account option on top of the page
On the Manage My Account screen, click on Update Payment Details, located under AOL Account Settings.
Enter your master Username, password ***** answer to your Account Security Question.
On the My Account Overview page, the Payment Method section gives you the option to change your credit card details
let me know if you are able to do it or face any difficulty
i have given you the information on how to change the card details..did you try the steps i gave??