Indesit WIA 111?

Our washer is only 18 months old. The dial that selects the wash programme does not appear to be working. The washer washes even when the dial is turned to the off position. The door light never turns off. We have to turn the washer off to turn the light out. I have phoned indesit who say it will be £99.98 for a one off repair or £15.90 per month for 10 months for a repair and 12 months guarantee. My husband says we can get a new washer for almost the same price. Can someone help.