Flipkart — Cheating customers in exchange policy

Address:

Buildings Alyssa, Begonia & Clove Embassy Tech Village, Outer Ring Road, Devarabeesanahalli Village, Bengaluru, 560103, Karnataka

Hi have placed the order on flipkart for new mobile phone with the exchange option. On flipkart website it is mentioned based on the phone condition exchange value will be decided. They have provided the exchange value list for the condition of the old phone. But when the person arrives for exchange they have rejected the exchange which is against their policy stating they don't exchange damaged working phone.
If the flipkart doesn't accepts the damaged phone then why they are showing the information on their website and misguiding the constomers.
This is causing mental harrasment to me having debate with the delivery guy to accept the phone. But eventually they have not accepted the exchange of my phone.

Even the customer care executive of flipkart agrees that whatever delivery guy has done is incorrect.