Myntra.com — Missed item in the order - cheated by myntra

Address:

560102

I made an order in myntra. The order was delivered and one of the item out of 9 items was missing. I made a complaint through their customer care after multiple attempt. I got a response after few days that it passed quality test and that they can't do anything. What are the legal steps that i can take against them? I am completely cheated and very frustrated.

Order id :[protected]-7869703.
Item missed : 1823595