Can't get messenger app

[Android Central Question]

I go to my Facebook to open the messenger part and it keeps automatic going to install on playstore however once i press install and it then says
' installed ' there is no link or any way to actually open it...not anywhere on my phone where my other apps are...

 

[B. Diddy]

Welcome to Android Central! Which phone? What if you open the Play Store app first, then search for Facebook Messenger -- does it give you an Install button, or Uninstall and Open buttons?