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.
This tutorial will walk you through the steps of turning off comment replies on your Facebook Page.
Turn Off Replies on Your Facebook Profile
Connect to your Facebook Page. Go to Settings > General:
Clear the Allow replies to comments on my Page checkbox in the Replies section: