[Resolved]  BookMyShow — pay offer

My booking id is wq3k53h
I booked a ticket for spiderman ffh on july 5th, the offer on payment for amazon pay was min 30 rs on 150 rs that means 20%.
But when payment was done of 262, i received only 31!!
Why the refund was less? Also if there was some rng here, this was not mentioned on coupon as well as this 'luck' factor on refund should be mentioned.
Kindly resolve my issue. I am literally fuming as i have extensively used bms in delhi but was always satisfied but if this is some kind of foolmockery, i need my compensation and rectifications.
Please resolve my issue asap as this year there are some great movies coming and if this is to happen again and again, i have to look somewhere else.