If for any reason (lost card, expired card, insufficient funds, etc.) you need to update the payment method associated with your account, read the instructions in this article.
How to change your payment method
Follow these simple steps in order to update your current payment method:
login into CryptoBooks and click on the Settings button at the bottom of the menu
in the Subscriptions section, scroll down to Plan details, then click on the Change method button
in the pop up window, fill in all the card details as follow:
Name on card
Card number
Expiration data
CVC
once all the required data has been filled, click on Save
done! your payment method has been updated