How to change card detail?

In ChannelUnity, navigate to the Billing page and click Payment Information on the left-hand column.  Enter the new the card details under Credit / Debit Card Details and then click the Save Details...

Billing information

To access your billing information in ChannelUnity, click Billing in the main menu. There are five sections: Account History, Channels, Invoices & Billing Information, Payment Information, and Sup...

If you want to sell on marketplaces but don't yet have an online store, Synchromatic is the solution for you.
More Details