Spares or repair: Swan 1.7l kettle (AB11)

Hello, I've got a Swan 1.7l Nordic kettle, used but still in excellent condition. However, the off switch started now to be triggered only a few seconds after I turned the kettle on. Hence, I need to hold the switch down to overcome this and get the water to boil. Apart from this, the kettle is in a very good condition. If you know how to repair this, please feel free to pick the kettle up. If nobody wants it until the end of this week, I will dispose of it.