to do this, please do the instructions below via the computer
Go to Manage Your Content and Devices.Click here to go to this page
From Settings, select Edit Payment Method below Kindle Payment Settings.
Select the desired credit card information, and then click Continue.
Update the expiry date and save.
This will then be saved and your Kindle will see this.
I can also do these steps for you, and have made a request via Additional Services. This is optional, and if you choose to do this, I can, with your permission, remote into your computer while you watch and do all these steps (and deal with any problems that arise during them) for you. Or if you do not choose to take this service, we can continue here. This is no problem at all. Just let me know please.
Let me know the results please