Questionable decision to write off vehicle

My brother registered a vehicle accident claim with Discovery Insurance and after the car was assessed at the drive in assessment center, he received a call informing him that they are writing his vehicle off. This came as a surprise because the damages are minimal, only on the right rear fender, back right wheel, rear bumper, some dents and scratches on the rear right door. Now to make matters worse, he requested to be afforded a buy back option because he took it for a second opinion and the Panel beater assured him that they can repair the car at a very reasonable quote, however the consultant by the name of Vanessa Padayachee gave him two options, either he allows the process to right the car off or HE WITHDRAWS HIS CLAIM, HAVE HIS CAR REPAIRED AT HIS OWN COST and they will assess and have it insured with them once again. What nonsense is this!!! The reason my brother requested to buy his car back is that he just finished paying it off from the bank and also recently had the engine overhaul and paid about R20000. Surely as a client this is a reasonable request to make from his insurers. He has his household contents covered by the same insurer. I would humbly request Discovery management to look into this matter and allow my brother to exercise his "right" as a client. All he is asking is for Discovery to please have his car repaired as he cannot afford another car installment.