In the Settings option of Nelio Content, you can delete a social profile from Nelio Content. Doing so, nobody can schedule new social messages nor any scheduled message will be published on that profile. However, Nelio Content will still have access to that network, since you can have other websites that do have configured that profile and thus need to post messages on it.
To completely delete Nelio Content permissions on Facebook, log in to your Facebook account and click on the Business Integrations option under Settings » Security and Login. Facebook will show you the list of apps that have access to your account.
Click the Remove button to the right of Nelio Content and Nelio Content’s permissions will be revoked. Of course, you can always return to give Nelio Content Facebook access Facebook.