Hi, it sounds like the pump/drain hose is just blocked, when you put it on a drain/spin cycle can you hear the pump motor turning? If you can then the pump is ok and there is a blockage in the drain hose or in the outlet system somewhere if you cannot hear the pump then the pump is blocked with something like a coin, hair clip etc or has siezed and will req a new one.
you can purchase parts from.
www.candmdomesticappliances.co.uk
paul
May 2009