Unhappy client

I often travel for business all over the country flying to my destination and making use of car rental. Avis is usually my prefered car rental supplier. In July 2021 I rented a vehicle from Cape Town International, I collected the vehicle 7am, at this stage it was stil dark. Did all the paperwork at front desk and the lady gave me the key to collect car in the parking bay. Nobody accompanied me to the car and car was all mist up as it was cold winters morning and was standing outside all night. Although the lady said i should check the car I obviously couldn't as it was still dark. She let me complete the checklist at front desk before me even seeing the car but i didn't think anything bout this as somebody is usually at the parking and we do normal check before I leave. This day there was nobody in sight, never received checklist and I left. Returned the vehicle the next day and the porter advised there was crack in hubcap. Said I was not aware of it and left. The actually charged me R849 for 1 hubcab, that they cant prove its me. Nobody did random check with me when I collected the vehicle. Their customer services emailed me telling me I'm liable for the charge and theirs no debate about it. I feel this is **************** and will definitely not make use of Avis rental services again. We in the middle of a pandemic and a company feel they can exploit clients like this, UNEXCEPTABLE!!!!