IFB — microwave making a horrible sound on switching on

Address:	Pune, Maharashtra, 411015
Website:	Flipkart

Hi,
I am soniya chavan.
I purchased the ifb convection microwave model no. 20sc2 from flipkart on 4th november, 2018 vide order no. Od[protected]
The technician came for installation 2 days after and when he switched on the microwave, it made a horrible sound. The technician told us to complain to flipkart, since i had purchased it through flipkart.
Immediately, i gave a complaint to flipkart.
Now, it is 16th november, but still no technician from ifb has visited to check the problem. Also, as per the replacement policy, flipkart had to replace the product, but even after complaining for 4 to 5 times, no one from ifb has come to check the problem. Nor has flipkart provided a replacement.
Every time i raise a complaint, ifb closes the complaint saying that the technician has closed the complaint.
I don't understand that when no technician has ever visited to check the microwave, how can he close the complaint.
It has been 12 days since i purchased the microwave, but it is just lying idle because of the reckless behaviour of ifb.