Yes, you can always resubscribe in case you have canceled your subscription.

- Log into your account page here
- Select the Subscriptions link from the left menu
- Click on the 'View' button displayed right below the subscription details. In case you have more than one subscriptions, select the specific subscription you wish to change the payment method for and then click on the 'View' button.
- Click the 'Resubscribe' button
- That will navigate you to the checkout page where you can basically place an order that will be associated with the canceled subscription.