Currently, to do this you must remove your existing card details during the check out process.
1. Make sure you have at least 1 track in one of your carts, then click the green 'Checkout' button on the bottom right of that cart.
2. At the check-out screen, click the blue 'Credit Card' button.
3. Click 'Remove this card' and follow the prompt.
4. Click "Yes" and your saved credit card details will be permanently removed.
Our customer support team can also remove your credit card details, submit your request here: https://traxsource.zendesk.com/hc/en-us/requests/new