Flipkart — Defective product and account blocked

Flipkart has suddenly blocked my account without any reason. Also regarding one of my order with Order ID# OD[protected] worth Rs. 2400 the product I received was defective and of poor quality and seven times they have rejected the return request without explaining any reason and finally when they are not able to resolve it they have blocked my account. Everytime when I asked them for reason they told me that there is some system problem and sometimes reason is unforseen. Everytime when they don't have any solution either they block the account or left the problem unsolved.