How can I fix my New Hoover quattro 1300, on-off switch??

Just moved into a new house with a Hoover Quattro Washer/Dryer 1300 (WS130) system, but the on-off switch won't stay on. If you push it in, and the light comes on, it'll start but as soon as you let go, it switches off again. Any ideas? Also what's the number for Hoover?? As the number in the manual is unavailable. I'm stuck with loads of washing to do for 3 children!!!!