Deposit Run Around

. I rented a Kia Picanto at the Kempton Park Head Office (Pomona) from the 2 May 2020 until the 1 June 2020 (***). When I went to extend further they said I should take the car on a new booking because I would exceed a month. I took the car from the 1st June until 13th June with the reservation number ***. Until now I have received only one R2000 deposit refund and am getting the run around for the second refund.