Poor Customer Service

I paid for a car rental with Avis on 26 September 2024. My rental agreement ran from the 26th until the 29th of September 2024. Avis advised me that it takes up to 48hrs for the funds to reflect and provided me with a letter to be sent to them for the pre authorisation. I called in on Friday to explain this and was told that my funds will be released on the 7th of October and that still hasn’t happened. Each time I call in I’m told that the transaction hasn’t been banked by Avis and therefore will have to wait for 7 days. When I call Avis, they tell me there is nothing to bank as the funds were reserved I’m highly disappointed with this run around I have had to do for a whole week and highly distraught with how this isn’t resolved despite explaining that I have been consulting with Avis and they have assisted me to the best of their abilities.