Avis does not refund deposit

I am beyond disappointed by Avis Car Hire and there terrible service at the cape town international airport. Arriving on the 19th of Dec 2025, waiting in a long line for an hour even though I had pre booked a car online and had a booking reference. Got to the counter only to be told a different car and additional charges will be given. I did not accept this and demanded the booking I wanted. Once receiving the car agreement I was informed that the car was brand new and no issues experienced, I got to the car and the air-conditioning was not working for the 5 days I had booked the car for. It was terrible in the heat.

After returning the car, I was informed that in 7 days since returned of car I will.be refunded my deposit..

I have since called the customer line twice now and 1st time it was confirmed that there was a delay and I should expect the funds on 6th Jan, today I am still waiting funds, I called again today lady said they made an error when charging me. Its supposed to be R6140.00 but the guy charged me R6440.00. Excess amount of R300.00. This was sent to their finance department to correct which is why it is delayed.. Lady name is Unoma or something like that. Another timeline of 5 to 7 working days.