Wrong Information in Web Site

Location/place: Kolkata

Name of company/service: ICICI Bank Web Site

In the offer section of ICICI bank web Site (http://www.icicibank.com/online-services/offer-zone/FernsPetals.html)there is a discount coupon of 20% is available for Order in Ferns N Petals.

I have given the mentioned coupon code, it was successful but however the amount has not been deducted.

Please provide the correct information in the web site.

Regards
Prakash Varun