I bought a pair of Andis for my Shih Tzu. I barely...

I bought a pair of Andis for my Shih Tzu. I barely got through one full shave before the motor stopped working. When I finished I cleaned them by the instructions. I just went to shave him again and they won t work at all now. I can t find the receipt so I wasted between $40 and $60 dollars on something that I need.