Flipkart — Wrongful denial of exchange of old smartphone

Hi, I ordered a new smartphone from Flipkart which had an offer to exchange my old device for a discount. I used the same offer to place the order. During the process of delivery the executive was supposed to inspect the old device for damages before approving the exchange.

The delivery executive manhandled my older device and wrongly pointed out that my device had damage. However, there were no damages on the device.

I shared video and photo evidence 24hrs ago but still Flipkart executive is just giving me lame consolation.

Please help I am being harassed by the untrained people at Flipkart who are just moving me around and buying time.