Black Pearl — gas stove burner not working properly and is under warranty

Address:

Gautam Buddh Nagar, Uttar Pradesh, 201301

One burner of gas stove is not working properly since the day i received it.
The product is under warranty.
I purchased it from amazon.
From starting week itself it is not working properly.
Please provide the service to resolve the issue as soon as possible.
I bought two burner gas stove in the month of july.. N as soon as i received it one of the burner stopped working completely after hardly 2-3 days. And the another burner's flame is very very light which makes it impossible to cook.. I bought this product from amazon.