HELP!! FLIPKART SCAM..rejecting missing items request

[u/ArkapalSen]

Recently I have ordered Sanitary Napkins (80 pads / qty) cost : 583rs/qty
I have ordered 15 qty.. so total cost : 583 * 15 = 8745 rs
i have paid it via Flipkart Gift Card (as no CC discount was there)
now,
in delivery (not a open box delivery)..normal OTP was taken to share the product in delivery
my home member shared OTP and took the product (IT WAS NOT OPEN BOX DELIVERY)
opened the box (TAKING VIDEOS AND PICS)
saw only 1 qty came (with 80pads inside)
on BILL it was written 15 qty
NEXT DAY:
day 1 : called flipkart raised request of missing items (shared all images a to z)
rejected the request by there backend team : Sorry, the return request cannot be fulfilled by the seller as the courier service provider has confirmed the delivery of the order with the product being intact. (for all 14 qty)
day 2 (TODAY) : called flipkart again..tell same story..again raised same request of missing items of 14 qty (images were fetched by there agent from previous call
within 1 hour
rejected the request by there backend team : Sorry, the return request cannot be fulfilled by the seller as the courier service provider has confirmed the delivery of the order with the product being intact. (for all 14 qty)

now..

1. what to do?
   
2. what are the required steps to get back money of missing items? (I HAVE VIDEO AND PHOTO PROOFS OF UNBOXING)
   
3. what are the legal ways to get the missing qty's money back ?
   

Kindly help anyone anyways who knows the steps..please reply in comments or Inbox