Rental with Woodford turned sour at car return

I am an expat, and fly home to South Africa 6 times a year. My current trip to SA I decided to give Woodford a try. I rented a Toyota Cross for 2 weeks. Everything was great, and I thought that Woodford will become my new go-to company for car rentals in South Africa. Then it happened - when I returned the car. The return guy went straight to my windscreen, and pointed to a chip the size of a pin head, but he went straight there knowing where the chip would be. Now, Woodford did not allow me to inspect the car before I took it - there was no report. The guy that handed the car to me said - it's brand new. Only to find out later that it was on 17000 km. Now they bombard me with emails and invoices for a chip that was already there when I rented it. What was initially a great experience with Woodford, turned sour. I will no longer rent from Woodford. I will go back to my trusted Hertz Car Rental