Through the Nelio Content Settings you can delete a Nelio Content social profile and thus prevent new social messages from being scheduled or the ones you had prepared from being published. However, Nelio Content will still have access to that social network, as you may have other websites that do have that profile set up and, therefore, need to publish messages.
To completely remove Nelio Content permissions in Reddit and ensure that none of your websites has access to publish in Reddit, sign in to your Reddit account and select the Apps option in your preferences.

You will find the third party applications with access to your account. Click on the revoke access link to remove Nelio Content’s access permissions to Reddit. Of course, you can always give Nelio Content permissions again by connecting the profile.