Bad assistance !!! A product called "Top level", u...

Bad assistance !!! A product called "Top level", used only a week, after a couple of cooking there is a great halo in the point of support of the pot. The glass looks damaged, as if the color of the same had melted at that point. The magic answer of the assistance: "the guarantee does not cover the glass top, we also write it in the garacity" !!!! Well sure, after all the glass did not you supply it? I'm not even able to provide a motivation for what happened. I must have tested these plans well !!
Best wishes to future buyers ....