Defy oven settings do not work.

Ever since purchasing a gas hob and electric oven Defy stove, though the gas stove works fine, we were very concerned about the workings of the electric oven. This week-end we purchased an oven thermometer and realize that the oven settings are completely out of touch with reality. Set at 100 degrees Celsius, the oven teperature climbs to over 200 degrees! No wonder we were never able to bake.