Spencer's Retail Ltd — Nestle Munch

Address:	600042
Website:	spencers retail ltd

Yesterday(06-Nov-2016), I bought a nestle munch box which contains 30 chocolates where in it is mentioned as 2 units free out of 30. so the cost of the pack would be Rs.280. But spencers retail ltd located in velacherry near Gurunanak college has rated for all 30 chocolates and they told that eventhough it is written as free, it is not free for customers. it is free for spencers retail. May i know what is called as free -(I mean its free for customer or retailer)? if it is for retailer, then why this company is writing free in box.
I feel it is kind of cheating they do.

Incase, my compaint is taken for consideration, i would submit the bills purchased.