Deposit not returned, Zero communication. Don't use Avis!

I hired a vehicle for a day on 21 September 2024. The deposit that I paid has not been returned to me yet and today is 05 October 2024. When I called to follow up on 03 October 2024, I was told by Sibo Sawa that the refund is visible on the system and has just not been processed, no valid reason could be provided. I was then told she would process the refund and I will receive an SMS confirmation which has still not come through. I tried calling Avis today and could not get through to customer care, note this was at 10h30. There is no communication from Avis and it is now 2 weeks where Avis is still holding my money, I would like to understand what is the reason for this delay as this should be the most simple transaction for a vehicle rental company. I had made use of other companies in the past whereas the deposit was returned almost instantly. I will not make use of Avis again due to this experience.