Kaff Appliances India — multiple issues with kaff hob

Address:

Bangalore Rural, Karnataka, 562114

I bought a kaff hob during june 2017. So far there have been multiple issues with it. The nobs dont function properly (Easily comes to hand), the burners release flame unevenly (Vessels are burnt).
In last 1.5 years i have raised at least 4 complaints (2 within the warranty period itself). The customer care is hopeless. Have to call them repeatedly to come and repair. When they come they always ask extra money (Other than the service charges) saying conveyance charges for which they don't provide the bill.
The current complaint i have raised on 23rd march 2019 is still not resolved (I was supposed to get a call within 2 working days)
The complaint number is :[protected]