Mac's Auto bad company

Hi hello Peter please assist I bought a car trading in my car at Mac's Auto near East Rand Mall across Kia motors imperial I found that the cars paper work is not in order a Golf 5 red in colour ,the paper work he gave me does not correspond to the car Mac's Auto sold to me ,I transfer R50,000 to him we did not sign any agreement while handing over papers I know its voetstoets but his paper work for the red Golf 5 is not in order so I did not want this deal any more claiming my R50,000 and my car I traded in he wants to keep R10,000 rand from my money and give me back only R40,000 this is not fair play the man wants to rob me daylight he's talking about his paper work saying its costing me R10,000 please assist this Mac's Auto is taking advantage cause iam a woman tell me also how will I get my money from this crook .......?