Car rental deposit still not returned after 3 months- beware of this company

Nissan South Africa organized a rental vehicle from this company for me. The vehicle was returned on the 3rd of September 2021. To date my R600.00 deposit has not been returned. Eventually spoke to person by the name of Greeson at the Durban branch. Filled in some banking forms and returned to him over a month ago- at which stage he promised my deposit would be returned to me in 4 days. it has gone over a month and they still have not returned my deposit. For the last two weeks Greeson has stopped taking my calls.