Not working since we bought it

The Samsung oven we bought we only had for 2 months then the one plate stopped working. Then the element clips came loose causing the fan to hit the elements. They had to fix that twice. The pre heat setting stopped working and after they replaced the motherboard twice they figured out the selector knob was not functioning correctly. This they replaced and then the oven still did not wirk. They then figured out that the grill setting on the knob was not working from the start. We never knew why it was not grilling as it should. A year later smoke came out of the selector knob and the knob stopped functioning on all the settings again. The oven is now an electrical hazard. To fix the oven costs about R900 each time. It breaks every year. We contacted the complaints section with no response since the oven is out of warranty. We would just advise you not to buy the Samsung oven. It keeps on giving problems and when it is out of warranty it will cost you more than just bying a better brand from the start. None of our friends have any oven problems and none have a Samsung oven.