SsangYong worst brand

We bought a Korando brand new, on 35 000km the gearbox packed up and SangYong South Africa replaced it under warranty with a "off the market" gearbox, a import that nobody can work on. The "new "gearbox gave problems from the start and we were told by SangYong Menlyn that its the oil which was replaced at every service. Now the gearbox packed up and nobody not even SangYong can repair the imported gearbox...and SangYong South Africa's reply is to s**** the car ?. If we knew SangYong was such a terrible brand we would never have bought the car. Terrable