android 4.4.2

Model: Proscan PLT1077G Android: 4.4.2 Checked site for updates and found nothing. Checked sleep settings and it is as high as it can go (30mins). Less than 15mins and it shuts off (96%). Battery saver and calibrator were tried but still reoccurring. I've tried the safe mode method. It says...

After my Google play store uninstalled its self I looked to see if it was disabled,but it was gone and I downloaded a apk of it and not even the apk works it says not responding,so I checked other places and it said install the apk and then reboot it I tried and that didn't work I also tried...