Below are the steps on how you can update the credit card information
online:
1. Open a browser and go to http://commerce.microsoft.com, sign into the Billing and
Account Management website with your e-mail address and password.
2. Under Your payment methods, click the payment
method you want to change.
3. Under Payment method activity, click "Go
to payment method information".
4. Under Payment method information for this
account, click "Use a different payment method".
5. Click "Add new credit card", and
then click "Next".
6. On the Confirm transfer page, confirm the balances
and services you want to transfer, and then click "Next".
7. Enter the information for the new payment method, and then
click "Save".