How can you Track Events using this plugin

Intercom support told me in order to get event tracking to work, I need to add this snippet:

Intercom('trackEvent', "emailEvent");

So I went through the plugin cf7 and I set up Additional Settings so when submit is fired, it will create an event.

document.addEventListener( 'wpcf7mailsent', function( event ) {
  Intercom('trackEvent', "emailEvent");
}, false );

I’m not getting any error and I’m not getting events firing off, so I have no idea wtf I’m doing.