Samsung customer care has terrible service

I had purchased a Samsung Microwave in 2015. In 2016 my microwave was sent in for repairs as the touchpad stopped working, a few months later the microwave was booked in again for the same issue and was repaired again, then a few months after that the same issue occurred and this time I had refused for the machine to be repaired and insisted on a new microwave. Within 1 year of having the new machine my microwave is giving me the same issue. I was told by Samsung that the machine is out of warranty and that I will have to bare the cost of the repair. I refuse to... Samsung needs to take responsibly for their faulty products. Same issue, different machine - that is a manufacturing fault. I have asked for a supervisor to call me back and well 2 days later he is still returning my call.