If you signed up via the Roku Channel Store through the Shudder Roku channel, you can cancel your membership 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 SUBSCRIPTION
If your membership is currently canceled you can renew it by clicking RENEW
If you would like to cancel your membership you can do so by clicking CANCEL
Please note: Uninstalling the Shudder Roku channel will not automatically stop your membership. You must cancel your membership to end your membership. If you uninstall the channel without canceling your membership, you will still be charged.