How do I turn these style of notifications off have already turnt smart pop up off
I think you refers to pop-up notifications, I hope ...
Go to the WhatsApp APP, in the top right corner, press on 3 dots and go Settings> Notification> Popup notification and select never for Mesages and Groups.
Tell me if you are refering about this Popup or its are others. Sorry I have not a mobile as powerful as your 
