Refusing with car papers and license disc

I bought a car, Renault scenic 2 2006 1.6 from the dealership, ask for change of ownership and license disk they gave me a run-around. Going to them for the 3rd time they told me the roadworthy certificate is done but I'm having outstanding tickets hence they can't get the disc. I paid the tickets but they did not pay for the disc. Now they don't answer our calls and WhatsApp messages. I spoke to Zane 0682289557,transferred me to Joe 0615173047 and I visited the dealership on several occasions at number 15 Catalina Ave, Rhodes field Kempton Park..