Really Avis??

I rented a car from Avis Wonderboom, the refundable deposit, which normally is only reserved on my creditcard gets deducted. This was the 2nd Feb 2016, on Friday the 12th of Feb I enquire as what is happening with that deposit seeing that the rental amount was already deducted and therefore \Paid\". The very helpfull manager at the Pta Central branch informs me that it is a Avis mistake and that the manager from the Zambezi branch would contact me in this regard. Today is the 15th Feb and no call???? As well as no refund!!!! Are we financing AVIS or what??? After acall to the call center still no joy!! And no refund!!! Itbseems that AVIS is makingbit impossible to use them in future! I am very ?!$$EUR@ off!!!"