To chat with Facebook support you can start by visiting the Facebook Help Center on their website. Look for the option that says “Support” or “Help ” which will guide you to various topics. If you need direct assistance there may be a “Chat with Us” button available depending on your issue. Make sure you are logged into your account to access all support features. Once you initiate the chat a support representative will assist you with your questions or concerns.
Source: https://support.google.com/admanager/thread/306542092?hl=en&sjid=4057354976220212872-AP