You can make any necessary changes to your Subscription orders by logging into your account. You will then want to click Manage Subscriptions to access your Subscription details. From there, you can change/skip shipping dates, ship products immediately, add/remove products, cancel your subscription, apply coupon codes, change billing/shipping addresses, and update your payment method.
Important: If you need to update your Payment Method due to a declined transaction or another issue with your credit card, your order may not always process immediately after updating your Payment Method. This depends on the type of charge issue. Be sure to check your shipping dates once the card has been updated.