Sunflame Enterprises — Sunflame GT Pride Glass Top 4 Brass Burner Gas Stove

I bought a sunflame stove from Amazon, ignition was bad from day 1 and few days ago knob caught fire and melted . i had to turn off the cylinder knob because there seemed no other possible way. I submitted the complaint and now service center team is saying it is not a big issue and they will just grease the knob. I do not want to put my life in risk because of this pathetic product . Please help me on this.