How to change payment method?

When you log into My Data Driven and look at the "My subscriptions" tab, do you see the following as described?

Subscription Management

Subscriptions display a set of action buttons below each subscription’s details on the My Account > View Subscription page. A subscriber can use these buttons to:

• Cancel or Suspend an active subscription
• Reactivate a suspended subscription
• Resubscribe an expired or canceled subscription
• Pay for a renewal order when the automatic recurring payment failed or the subscription uses manual renewals
• Change the Payment Method used for automatic recurring payments
• Change Address for subscriptions which require shipping

You should be able to change your payment on that page. Here's the direct link for when you're logged in: https://my.datadrivenu.com/account/ and then click on the My Subscription tab.