Flipkart blocked my account with money, not returning money

Flipkart.com has blocked my account. On raising the complaint, they did not say any valid reason. Now they are saying that the account is blocked due to a high number of returns.  Fine.
If they do not wish to unblock my account then they are obliged to return my money which is Rs15,991 stuck in Flipkart Wallet. They are not returning my money.
I have already tried to get my issue resolved via multiple channels, like customer support, social media, but they are not responding anything on my money.