Bad bad customer service and keeping peoples money

I had a very bad experience with capitec and im very dissapointed in their customer service. On Wednesday night i deposited a whole bunch of R20 and R10 notes at the machine outside Riverbend spar in Gonubie. I used my card to make the deposit. Before it was my turn i tried to count the money but due to the amount of people lining up behind me i stopped at R800 thinking the machine will count the money anyway. As i put the money into the machine it closef and started counting and all of a sudden it stopped and a message appeared on the screen saying "transaction cancelled" but i did not get my money back as it was inside the machine already. I immediately asked the manager if i could phone the bank to report and they gave me a case nr. On Friday afternoon i contacted the bank and asked them why my money is not showing in my account. The response i got was... Please provide us the EXACT amount you deposited. Of course i could not as i stopped counting at R800 before it was my turn to use the machine so i told the lady it was not much more. Then i was told that i can not get my money back unless i provide them with an EXACT amount. So i then rep**** please just psy the R800 in as i know it was a whole bunch of only R10 and R20's. But same reply. I then asked her so you just going to keep my money and that is theft. I even asked them to keep the rest just pay the R800. Answer was NO and was told my case is now closed. I need help as i could not get it from Capitec customer service.