Hidesign India — Gift Card is used but amount not reduced from overall total

I was trying to buy a handbag from the website. I had a gift card ([protected]) worth 2000 rupees which I tried to use for the purchase. When I gave the code and the pin, it accepted and gave a message that this amount will be automatically reduced from the billing amount at checkout but it did not. To my surprise, the amount is now showing as 0 in my gift card!! I do not find it anywhere on the portal as well which makes me wonder - Where did the 2000 go? I have tried calling your call center but no response. Please let me know the solution at the earliest.