Panasonic — Duplicate or Defective Glass turn table given with Microwave Oven

Address:

Bangalore

I had bought a Panasonic oven, model NN-CT64HB around 3 months back.
It has been used very rarely and last week during pre-heating of 180 degree the glass turn table cracked into two. While informing the service team they claimed it cannot be covered under warranty and have to pay 980Rs. for the accessory. They also refused to check if there is any defect with the Microwave oven. I think either they had given a duplicate glass plate or it’s defective. I would like to hear from Panasonic regarding this issue.