Kurl-On — Unable to replace the defective mattress even though in warranty period

Address:

Hyderabad, Andhra Pradesh, 500050

I raised a complaint regarding my defected mattress - ta-2481 in the month of march '16. On 12th apr, the guy suresh came to our house to inspect the mattresses. He confirmed that one of the mattress is going to be replaced. Still after so many follow ups, my mattress is not replaced.
When i call the customer care on 31st may '16, they told me that the complaint has been closed from their side - citing 'their team didn't get response from my side'.
Not sure how to proceed now.

My details:
Bipul singh rajput
[protected]