Myntra.com — Refusal to comply to the offer at the time of purchase

Address:	Burdwan, West Bengal, 713303
Website:	Myntra.com

Myntra provided me an offer of cashback at the time of purchase and i even inquired from their customer care whether i was eligible for the offer they said yes and now myntra won't give me cashback and instead offering me coupons which are available to all. So please help. my order number is[protected]-1496303.i have mailed them for help but everytime they refuse sying this is the maximum we can do and myntra's customer representative himself called me and told me to place the order but now they don't acknowledge my claim. Please help