Whirlpool Canada

I bought a Kitchen Aid slide in range with a ceramic glass top in April of 2017. Model number YKSEB900EWH. My previous stove was a GE Profile with the same top and I had it for approx. 17 years with no issues. After less than 2 months, my new Kitchen Aid developed a white spot on the glass top on the bottoms left front element. I called customer service and since it was over 30 days they said they cannot do anything for improper cleaning of the appliance. I finally managed to book a service call and the company called to ask for a picture before they came out which I sent to them. The day of the service call came and went and when I called Kitchen Aid customer service they said the service company called it improper cleaning and they cannot help me any further. How can I have the same top on another stove for 17 years with no issues and now this is happening after less than 2 months ?? Customer service then offered me $200 to keep quiet and go away . I have even purchased extended warranty on the appliance which does not cover " improper cleaning" according to them. How can this be improper cleaning??? It has never happened over the past 17 years.