Not accepting responsibility for scratches

I took my car in for a service and identified scratches after I picked it up. They rushed their own checks for scratches when they accepted the car . I even have evidence of a massive dent that already existed on one of the doors that they didn't even pick-up. I gave them a week to investigate the matter and they got back to me basically saying that their report concluded that they didn't scratch the car. They then disregard their own check sheet and are now refusing to accept responsibility. Terrible that there’s no more ethics in business these days.