SIXT keeping hold on the holds

Booked a vehicle for collection at PE Airport on 30 March 2025 the vehicle was fine took the super insurance to reduce the deposit so they held R3,800 on my Credit card. Returned the vehicle on 3 April no problems with vehicle . I received my invoice on 4 March indicating nothing was owing. I read their invoice indicating the deposit is held for 11 working days which I thought was a little excessive but anyway that is their policy so have to wait. Yesterday was 29th April the hold on the R3,800 has still not been removed so I called Sixt Customer care line were I told the lady to release the hold today. She stated that the problem was on ABSA side but she will escalate the problem and send me a case number which I never received. I called the bank and they stated there was no hold up on their side. So after reading some of the reviews on Hellopeter this seems to be a common complaint from consumers with them holding onto funds for excessive periods of time I normally use Europecar but thought I would try this company but was the first and last time