Can you update you payments settings via the website on your computer please.
Do this via my instructions below
Visit the page for your account - click here to go to this page
- Log into using your Amazon account (the same Amazon account you have registered on your Kindle)
On the right side select "Settings"
Under 'Kindle Payment Settings' (first option)
Click 'Edit Payment Method'
Change your credit card details.
Restart your Kindle and sync it.
It will then be updated
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