If you are unable to resolve the issue you are experiencing, 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 further assist you.
Can you please provide us with more information regarding the issue you are experiencing? Are you trying to cancel the Peacock screensaver or Peacock TV subscription? Send us details and we would like to know how we can help!