Flipkart — As a Seller I Received 5 years old used product from buyer but settled claim is lesser

I am a seller on Flipkart. I received a used product in return from buyer.
Product cost 2600/-
Flipkart charged me about to 700 rupees for this order and return and i got the SPF Claim only 824 rupees.

How Flipkart Justifying Difference Between New And old one by 100 rupees?

I am not begger. I just want my Haq.

Received very old product, completed drity and all screw and nuts are Iron rusted. As I collected the detail products from manufacturing company that told me that product was bought from Mumbai in 2016.