Flipkart - Order cancelled without giving reason

Had ordered a Nokia *.* handset and had availed if a cash back offer on the SBI card plus exchange if old mobile. I paid for the order and was accepted. After * days I get s message that the order as cancelled and refund initiated. The Amazon buying offer was also on when I had ordered and u could have availed of a similar offer there had they cancelled the order in a day. I lost out on both fronts due to inadequacies of fliokart. Had been a buyer since inception if flipkart. Thus has left a very bitter taste . OD******************