1. Freechat apps are fully based on the web version of chat services. Sometimes the original service has a temporary failure, so you only need to try later to get the issues fixed.
Please check WhatsApp Web or messenger.com, in your browser to find it out, before you keep reading this.

2. In case if your chat service is working, the first thing you need to do to try fixing any issue is to reinstall the app.

3. In certain cases, only a full reset of the app can help: Reset FreeChat for WhatApp or Reset FreeChat for Facebook Messenger.