Hotspot frozen

I have a Netgear (Sprint) Hotspot. It's pretty much plugged in all the time since I only use it at home. When I couldn't connect to the internet, I checked out the display and, of course, it read, 'Battery full. Please disconnect power. ' So I did, but the display didn't change. I tapped the x, nothing. Then I noticed the battery symbol, top right, was showing a low battery and next to it were the words 'no battery'. Yet it still was saying battery full and the blue light was blinking (occasionally it double blinks). I thought to reboot it. Held down the power button until a green button appeared reading 'Shut down', but it won't let me press it. Like the screens not working. So, I either have 3 symptons or 3 problems. 1) 'no battery' 2) unresponsive screen. 3) No internet connection. One more thing, don't know if it means anything, but it keeps waking itself up from sleep mode. Please help, I'm using up my very limited phone data.