Screen went completely black

How do I get rid of the wifi calling notification? I keep turning it off, but I still get a notification and I forgot how I turned it off last time. Lol
In the notification list, slide the wifi notification halfway to the right, choose the gear icon, then turn off notification.
 
Also I went into the app to turn off the notification and everything was greyed out. I just disabled wifi all together with package disabler and so far no more notification. I'm perplexed because I don't think I had to do that last time. Oh well it's gone.lol
 
So my screen went black again. This phone is making me super nervous. I should not have to keep soft resetting my phone.
 
I went ahead and called them to get it shipped. Hopefully I'll have better luck with note number 3.