Unwarranted damage charges

On the day of receiving my car from Bidvest Hatfield, they did not properly do the pre-inspection. There was damage to the side of the car and the windshield had a big chip in it. I pointed out the damage to the side but not the chip. right after leaving I saw the chip and called them within 15min of receiving the car. They assured me that there was no way that the windshield was chipped before I received the car and they apparently checked the previous damage report as well. When handing the car back to them I found the previous checklist in the car and it was indicated that there was in fact damage to the windshield and two dents on the body. I showed them this paper and they immediately took it from me and threw it away, stating that it had nothing to do with me. The lady helping me then said I will have to fix everything. I denied payment and after getting frustrated she just told me to leave while shouting in another language to one of her co-workers. This is unacceptable and I felt like they were using customers to fix problems that they should have fixed before handing the car over.