To change a Customers Bank Details, you must follow the steps below...
Go in to the Customers/Members profile.
Click on the "Payments" tab.
Cancel the Direct Debit mandate.
Next, click on the "Memberships" Tab and select the Membership plan by clicking the edit button. If they do not currently have a membership plan you will click 'add membership'.
Finally click on 'Setup GoCardless Subscription' and enter in the Customers/Members New Bank details (Account Name, Sortcode & Account Number).
Your customer will receive automated communication from ourselves and GoCardless to confirm the changes.