Deposit taking too long to be refunded

I wish I had read the reviews before using Hertz. I returned the car in same condition as received with a full tank of petrol on the 12 Feb 2024, it’s been 12 working days and I haven’t received my deposit back. The hertz call Centre are quick to quote the contract terms that deposit refund takes up to 21days however when deducting the money they did so in a matter of seconds. R15000 is a lot of money for me and this rental is really impacting my finances. Incredibly disgusted with this company and their lack of concern with returning customers deposit timeously. As this rate, I should be receiving money with interest. Will never ever use the people again and will ensure I inform everyone I know about them. No one should face financial difficulty from a rental. Most companies take the deposit as a hold on the credit card, Hertz did a complete deduction.