Late Deposit and bogus dents

SANI Car Rentals is a ****!!! Hired a polo white polo vivo in Cpt Int Airport in July 2024. Upon return they identified dents on on the roof top of the car. Mind you when I took the car they only did checks around the car and wheels, suddenly now they check the roof. I struggled to get my deposit back. Now in October 2024 they send an email notifying me that I owe them R2900 for damages that were there already when I took the car.