The light bulb on my Zanussi Larder Fridge has blown and the light switch (with 4.49 printed on it) has burnt out. Is it possible to replace this part? Incidently we’ve been having a bit of trouble with the ‘stat – sometimes the food on the bottom of the fridge freezes even on the warmer No 2 setting so therefore I’d like to purchase a replacement whole long stat/light unit? Is this possible?