Fabtab lifeware tablet just turned off

My Fabtab Lifeware just turned off! I was playing COC then suddenly it turned off. I TRIED PRESSING THE POWER BUTTON ABOUT 20 sec. but sadly nothing happened then later I tried pressing the power button and volume down at the same time but still .. Nothing happened! What should I do? Please help me! And btw, my tablet is 70% before it turned off. Gosh!