Very Unhappy

I bought my car kia picanto lx 1.0 auto in June 2013 my car is still fairly new and still under warranty , it had problems starting and I was towed to the nearest kia dealership . they took the car and they advised they are not able to tell whether the reason for the car not starting is due to warranty problems or the accident . the car was involved in an accident and was fixed by a kia certified penal beater . we asked them if you cant see what caused the car not to start why are u automatically excluding warranty cover , they asked for service record and prof that we claimed from insurance and the car was fixed , we were able to provide the service history for 30000 km which is the recent one and the proof from the insurance but still my car is not fixed and they are taking me from pillar to post . Please assist and advised what is the way forward as I think they are taking advantage of the mere fact that im a woman .