Nissan Magnite is not road worthy

We bought a Nissan Magnite from CMH Pinetown, which within 3 months gave us an engine hazard failure. They refused to fix it under warranty as we apparently damaged the radiator.. not that we were aware. Car leaked coolant/water and failed to inform us. By the time we realised anything was wrong the car just died. After escalating this to Nissan SA, a bogus report was compiled between the two justifying why they wont fix our car let alone give us a new one. Our insurance ran their own tests and the engine is damaged beyond repair. The kind of damage you'd expect from a car in an accident. I do not recommend this vehicle at all, even some of the oldest cars inform you of a coolant shortage before anything can even happen