That feature on your Facebook business page - “usually responds in …”? When that says something like “3 days”, it could really hurt your business. With 3CX you can deliver Facebook messages immediately to the web client and smartphone apps. Agents can answer, transfer and resolve customer queries from the same platform they use for all other communication.
Simply complete the integration with your Facebook account, assign incoming chats to a queue, and your agents will be able to respond just as they would a live chat.