I have an Armor X6 Pro. It will NOT turn off.

It doesn't matter what I touch on the screen, it puts a Green box around that object, but nothing happens. I had just checked a text message. When I picked the phone up to turn it off, I pressed the volume down button. I realized it when It put a bar up on the screen. I then pressed the volume up button; but it didn't change the volume setting. I'm unable to do anything now.