In order to update the credit card details for a subscription, access your myAvangate account available at the link below. In the “My Products” section, please click on “Update credit card info”.
Step 1 - Access the "Update credit card info" link.
Step 2 - Enter the new card details or select one of the cards already available in your account.
In the "Payment Methods" section you can add new cards, update expiring ones or simply remove all the cards associated to your Avangate myAccount.