Is an automobile insurance provider required to repair your car to prior to accident condition?ic

My car was rear-ended at a traffic light, and sustained minor damage that his insurance as agreed was his fault. They are only going to pay for applying epoxy filler to the plastic bumper, sanding, and paint. I feel that since I had a used bumper cover with no damage prior to the accident, I am entitled to have a used bumper cover with no epoxy filler after the the accident.