I'm sorry about the issue. Is there any error or message when trying to change your new visa card?
Do you mean you were able to purchase books, i.e., you were charged for the books, but they did not get download on your kindle?
What's the model of your kindle?
Is your kindle currently connected to Wi-Fi / wireless?
Please reply at the box below. Thank you,
I can call you, please accept the offer and I will then call.