TTK Prestige — GTMC 03 Gas stove

I purchased GTMC 03 gas stove in the month of March in the month of May we got to know the leakage of gas from the knob, we have raised a complaint regarding the same and service people have told it will be solved in 2 working days, it's been 2 weeks and still the issue is not Resolved.
Lot of gas is being wasted while we cook on the other side of the burner, they are just assuring that it will be fixed tomorrow..., but still the issue is not been resolved.

Worst service from the so called "India's favourite gas stove"Prestige.