Amazon India — Non delivery of the product, box was empty

Recently I ordered a
Yamaha AG06 MK2 Black 6-Channel Live Streaming Loopback Mixer/USB Interface through Amazon.
The product was delivered on 25th January 2025. When I opened the box the product was not in the box, I received empty box. The product was Cash on Delivery. Product was of 16999/-

I called the customer care for the help they said that our investigation team is saying we have delivered the product.

I have written multiple mails to them, but they didn't responded. Twitted multiple times on twitter.

Then I have taken a legal action against them through Online Legal India, but they didn't responded to that also.
Attaching all the concern documents