Deposit not returned

I hired a car on the 26th of January and returned it the morning of the 29th. When I hired the car, I was told by the lady in the Strand branch that if I use a debit card, the refund will be returned after 7 working days, but if I use a credit card, it will be released within 24 hours. I chose the credit card, even though my bank fees will be higher. By the 3rd the R2000 deposit was not paid back yet, so I contact their accounts department and was told it will reflect in my bank within 24 hours. It is now the 6th and it still does not reflect. Now the branch does not answer my calls anymore and accounts do not answer my emails. Do not trust them.