Poor Service with Hertz

It's now 22 x working days after the vehicle was hired and the R7000 hold on the credit card for the deposit has still not been released. There were no issues when the vehicle was returned, and while I can understand a deposit being held for a time after a hire in case of traffic fines etc, a full month after seems excessive. When I contacted customer services (a misnomer if ever there was one...) I received feedback that a) it's not Hertz that releases the hold but rather the bank, and b) that the hold was not a charge. The issues with this brushoff is that a) the banks don't do anything without an instruction from the client (Hertz) and b) the hold may not be a charge, but you still don't have access to the funds for over a month... The recommendation is not to hire from Hertz and use another (any other) car hire company if possible...