Ola Cabs — Regarding the non applicability of my coupon of rs 200/- off

Address:	Hyderabad, Andhra Pradesh, 500049
Website:	www.olacabs.com

This incident happened on 6th nov 2015 at 1.00pm. I have booked my ride with a referral first free ride of rs 200/- but at the time of my payment i din't get that offer. Whom should i blame for this? but ultimately it was my loss, i have paid Rs 164 for that ride. I demand to get my loss of Rs 164 as it's not my mistake.