Cleartrip — Cashback not received on using coupon code.

My Trip ID is : [protected]. I made a booking in a Hotel at Bangalore. There was an offer of 30 % Instant Cashback on using HDFC Credit card for the payment. The total amount to be paid was Rs 4390. But, after applying the Coupon Code, the total amount got reduced to Rs. 3073. Before payment, it was showing the total amount to be paid is Rs 3073. But, when I did the payment, I was charged the initial amount of Rs 4370 and no Discount/Cash back. I tried to resolve my problem through Customer Care. They always put the call on hold and then they said that a callback from a Senior executive is scheduled for you. But, nobody called me up. One thing I can surely say now is that Cleartrip is the worst service for booking anything they offer. They are such a beggar kind of people, even worst than that. Atleast a beggar asks for money while cleartrip just takes money from your pocket. Bloody pickpockets..