Flipkart — Flipkart account blocked without reason and no refund processed

Last I ordered grocery from flipkart and they cancelled the order and blocked my account, after which I raised complaint and then I received a mail stating that my purchase history shows some items for for personal use. I am not sure what is there in grocery that cannot be used personally, so mailed them but I have not received any reply from them. This is total harassment from flipkart.