this whole door must be changed under insurance. dont go for repair no matter what the surveyor or insurance company insists. just call the toll free number of Atlas Insurance to lodge a complain, they will ask you place of survey of vehicle and a surveyor will come to take pictures. since car is 4 months old, depreciation on part (door assembly) will be maximum 5% (talking w.r.t Adamjee Insurance's standards) and labour will be 100% borne by Insurance company. thats all.