BookMyShow — pre-booked f&b vouchers have below par value

Address:	Mumbai City, Maharashtra, 400007
Website:	in.bookmyshow.com/mumbai

I booked tickets online on book my show for 8 pm show of golmaal again movie on 26th oct at roxy theatre, opera house. On the book my show website, i also chose to pre-book food & beverage (F&b) for a pop-corn & soft beverage combo worth inr 170.
To my surprise and disappointment, when i redeemed the f&b coupons at the counters, i was handed small size popcorn worth rs 50 and pepsi worth rs 75 against the pre-booked f&b coupons.
My complaint is against this cheating by book my show where they promise f&b worth rs. 170 which actually turns out to be of cheaper value when you endorse the coupons at the cinema hall counters. I would rather not book any f&b online and would save my money by buying directly at the cinema venue.