Bests & Worsts Reviews from Amazon

I purchased this oven at the end of January 2018.... now just over 1 month the oven timer knob (which is plastic) has broken. This is the knob you use all the time to turn the oven on/off. I'm having no luck in finding a replacement knob.... Ok, it now two weeks later and I am changing my rating to one star ..... today on the same knob the timer no longer works. Oven just stays on indefinitely.... I thought I would love this oven and it is great looking but I am really worried that it's defects may start a fire.