Bought vehicle with a defect at Rally Motors Bfn

Before signing, I brought it to the attention of the salesman that there is a oily milkish substance in the water of the radiator. He told me that they would do a leakage test. A leakage test was never done. The radiator cap was replaced and I was assured that everything was fine. On my way to Hartenbos, the engine blew a top gasket. During the repair of the vehicle at Rally Motors, I requested a year guarantee on the work done as well as the parts used as well as the scheming of the head, and he agreed that he would supply me with a guarantee. Fetching the vehicle, nothing was ready. I was promised that it would be ready the following day, but when I came there, nothing was ready. I phoned the dealer with regards to the guarantee. He told me that he was sick and tired of my petty nonsense and that he would definitely not supply me with a guarantee and put the phone down on me. He made a fool of me by telling me that I must draw the RMI policy from the internet and paste it on the walls of my room. I definitely have the right to request a guarantee as I am the customer and should feel comfortable with the product I bought. 2nd time buying at Rally Motors. What a terrible mistake!