Rental deposit not being paid - rentalsdotcom/tergro alberton

The rental agency is not serious about paying deposit back it seems they just want to keep I have been asking since i moved out month end and they keep sending me from one person to another the agent said office office referred me to a CEO CEO was rude on the phone and told me to send an email and email he doesn’t respond I have told the agent the things and bad for me and i urgently need my money but I still haven’t been helped