Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
You have to jump through the hoops at https://support.roku.com/contactus , but keep in mind that if you ever tried the free trial in the past you will be automatically subscribed if you try to sign up for it again.
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For account and billing related issues, please reach out to our support team directly here for your 'Account or billing' issue, here: https://support.roku.com/contactus. They will be able to further assist you.