Hello, My name is ***** ***** I'll be assisting you. I'm sorry you're having problems.
To change any CC information, you need to update your Amazon "One Click Payments" credit or debit card info from a PC (not from the Kindle directly) at the link below:
If you need further assistance let me know. Before you go, PLEASE DO click at least a 3 STAR RATING, at the top of your screen. That is how I am credited for my efforts by the site. You can follow up any time as needed at no additional cost.