how can i fix my washing mashine, indesit w103?

when i load my washing in, select a program, and switch it on...it starts filling the machine with water and detergent and instead to start washing the program control handle starts spinning around over and over...i tried to stop it open the door, unload the whashing, load it in again and start the machine and its the same story...handle spinning! please help...it is quite a few years old machine but i can't afford to buy a new machine...thank you very much for your help!