Second Hand Dealer selling cars that is on the owner's name.

I had a Renault Clio Reg: JDL 937 MP, that was swoped in June 2017, It was Swoped to Mr. Tobie And Dorothy Daphne Spies Id nr. 880 ********** 089. Vryday 15 September 2017 the car was sold to Jp's Auto Second Hand Dealer in Middelburg. Mr. Tobie said the car is on there dealer stock and off my name, but now this morning that I wanted to register a car on my name by the Licensing department in Centurion, It showed that the Renault is still on my name. I contacted the JP's Auto Dealer and they told me the car was sold on Saterday 16 September 2017. Can Any one help me sort this out Today?