I want my money back

Last week I visited a Capitec Bank in Town (station) to withdraw R2500 from my account. The ATM dispensed R400 - I WAS GIVEN R2100 SHORT. I contacted the Capitec call centre to report this on the same day and was promised feedback within 48hours... I later that day received an SMS confirming who was responsible for my case. I got no feedback within the specified timeframe, so I had to call them AGAIN... to be told that I have to wait for G4S to visit the ATM and count the money (in 2018). This flawless process will take a period of 4-6 weeks to approx to complete. I followed up with them again today and spoke to a manager who offered to do NOTHING. So CAPITEC is telling me to wait all this time - without MY money - to later come and apologize and then refund me. I want MY money now and apologies later. Is there no other quicker way to sort this out ? For a bank that preaches simplicity and sophistication this is *******. I would've expected this resolution in 1990. I will not let this go and will keep escalating till someone actually does something.