If you signed up via the Roku Channel Store through the Sundance Now Roku channel, you can cancel your subscription by visiting the Roku owner site and following these steps:
Go to owner.roku.com and sign in to your Roku account
Under "Manage Account", click on "Manage Your Subscriptions"
If your subscription is currently canceled you can renew it by clicking "Renew"
If you would like to cancel your subscription you can do so by clicking "Cancel"
Please note: Uninstalling the Sundance Now Roku channel will not automatically stop your subscription. You must cancel your subscription to end your subscription. If you uninstall the channel without canceling your subscription, you will still be charged.