In ChannelUnity, navigate to the Billing page, click Invoices & Billing Information on the left-hand column, and then click Update Billing Address button. Update the card expiry date / address ...
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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...