Going back on your word - Give me my spare key!!!

I bought a VW Jetta from the dealership in early November and before the sale specifically asked the salesman, Raylord, if there was a spare key and he confirmed that there is. After I bought the car and asked for the key he said he made a mistake, the spare key he saw was for another car. Had I known this I would have made a lower offer, since a spare key costs R3900. I insisted that I want my key as promised and Raylord eventually promised to get me a key by end of January. I emailed Fanie Schoeman, the manager and notified him. When I phoned end of January Raylord had left work