Avis "business"

I am very disappointed with AVIS after renting a vehicle from 15/12/2020 to 17/12/2020 at the OR Thambo branch. In this period, the right back wheel's hubcap of the corolla quest was ******. Upon returning the vehicle on the 17/12/2020, I informed the inspector of the ****** hubcap and inquired at the AVIS desk about the cost to replace the hubcap (as a single hubcap for the mentioned vehicle retails for approximately R550.00) and was told I will have to pay for 4 new hubcaps (estimated at R2000.00 as stated by the clerk) as AVIS works through a dealer which only supplies sets of hubcaps. I was told it is only business. I then requested that AVIS supply me with their clause in their legislation that states that it is the driver's responsibility to replace all 4 new hubcaps in the instance of only 1 being damaged/****** in the rental period and also request that I get the other 3 hubcaps as I am only liable for the 1 which was ****** and according to AVIS have to pay for 4 new hubcaps. AVIS then stated that I will only be liable to replace the 1 hubcap that was ******. I was charged R1177.21 for the 1 hubcap, absolute ****************. With no breakdown of how AVIS got to that amount. Utterly disgruntled.