Indesit Washing Machine - Clothes still wet?

I have an Indesit Washing Machine, model number WIDL126, which is two years old.
Upon completion of a programme, the clothes are still very wet, there is no actual sign of water in the drum but the drainage or spin obviously isn't working properly. I have checked the pumps and pipes and there doesn't appear to be any blockages.
Does anyone have any idea what the problem could be and what further checks I can carry out?