Day light robbery

I was renting a flat in Arboretum Richards bay for 7 years. The agency that I first rented through was Theas estates and an amount of R3700 was paid to them as a rental deposit. This was in 2007. In 2010 ths agency moved away from Richards bay and my deposit was transferred to Eldu properties as they were taking over the rental of the flat. I was then asked by the owner to start paying my rent directly to him and not through Eldu properties and I started doing that. I moved out of that flat on the 30/08/2014 and to date I have not yet been refunded my deposit. We have tried speaking to the owner of Eldu properties, Elmari Du Plessis after searching for them as I have learnt that she is now in Kempton park concerning this and still she has not refunded the deposit. This is absolute robbery.