Hello, My name is ***** ***** I'll be assisting you. I'm sorry you're having problems.
I would suggest checking your Amazon "One Click Payments" to make sure your card info (and expiration date) matches the one they have on file.
To change any of your CC information, you need to update your Amazon "One Click Payments" credit or debit card info from a PC or Laptop (NOTE: This can not be done from the Kindle directly).
You can view more information on how to to this from the link below:
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