Flipkart — flipkart account hacked and changed

My account has got hacked and the hacker has changed my email id and password. He has also used my gift card to order various things. Customer care is not helping, no one has intervened. They have poorest security authentication.

I even emailed to [protected]@flipkart.com which was given by customer care but no response. The customer care support took it very casually and told that it will take 2-3 days to resolve issue. They dont even understand seriousness of the situation.