liebherr ctpes3213 short circuit due to mouse attack

My lovely liebherr fridge freezer was attacked by a mouse and doesn’t work anymore. the electrician examined the fridge and told me it was a right off and too expensive to repair. I am not convinced. the electrician told me that the mouse had chewed the main power cable which had then shorted and damaged the board. I presume he meant the control board. Do you have these control boards in stock and if so how much would you estimate for repair. Do you have a repair service? The fridge cost 500 pounds so I think may be worth repairing. thank you.