My credit card number has changed.

Greetings!

This is Tin, I'll do my best to help. If your credit card has been updated or changed, you can update it by following the steps below:

Please go to https://account.microsoft.com/services

Please choose your subscription, hit Manage and choose Change how you pay or Update payment method, please add your new credit card and save the changes.

You can also follow the steps from the link below:

https://support.microsoft.com/en-us/accounts-billing/update-a-microsoft-account-payment-method

Thanks,

Tin