Avis ******* debit on my account

My insurer rented a vehicle for me from Avis. I returned the vehicle to their premises in Sunninghill on 21.12.2021 in the evening but could not drop off the key as they closed the key box. I left the vehicle at their premises and returned 2 days later to drop off the keys as i have been travelling. The person receiving the keys and I checked the vehicle and found no damages and Ieft. A few days later i was called and told that there is damage to the windscreen and told that i could come check it as the vehicle will only be moved in January 2022. Today i got debited an additional R1369.00 whilst i was expecting a refund for my deposit as i brought the vehicle back with a full tank of fuel.

The vehicle was checked and it was confirmed that there were no damages and now i am being charged more than R2000 for a windscreen which i left in good order