How to update your billing information or email

1. Login to the customer portal. (Not sure how to do this? To find this link, go to the original Subscription Confirmation email or the more recent Upcoming Order email)
2. Click the Payment Methods
3. Click Add new payment method and enter the payment method details.
   
4. Click the Subscriptions tab and click Edit on the subscription to be updated.
5. Select Payment method on the left-hand side below Shipping address.
   
   
6. Return to the Payment Methods tab, expand the old payment method and click Remove payment method. 
   

If you used PayPal as your payment gateway, you can edit the payment method in your PayPal settings. Otherwise, you need to cancel the subscription and start a new subscription via checkout.