Facebook includes tons of great features that make staying in touch with friends and family easier, including private messages, photo and wall comments, and even comment replies, which allow users to respond directly to comments left on your Facebook Page. However, if you find that any of these features become a nuisance, you can disable them in the site's settings.
Turn Off Replies on Your Facebook Profile
Connect to your Facebook Page. Go to Settings
Clear the Allow replies to comments on my Page
checkbox in the Replies
Click Save Changes