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 may unsubscribe the channels from your TV or online account. On your TV, highlight the channel and press the * button to manage the subscription and cancel the subscription. I've provided a link to go into further detail: How do I manage or cancel a channel subscription? - Roku
Please let us know if there's anything else we can help you with.