Flipkart — Product defect

Address:

Maharashtra

I recently ordered books from flipkart. Com.. The books were on name of : yash kshatriya.. Mob: [protected].....my order id: OD[protected]...I had ordered three books named as "comprehensive chemistry jee advance 2014...nd other two books of maths and physics respectively by tata macgraw publisher "... I received my books on 13/08/2013..The books which I received are same as the books titled"complete course in chemistry 2013.. Other books of maths and physics respectively by same publisher tata macgraw...".... I had already purchased those books from flipkart itself last year
. order id : OD[protected]..date:14/12/2013.....The only difference between the new books which I received day before yesterday and which I purchased last year Is the cover and the name.. Rest all content inside the book is the same... I approached flipkart regarding this but the not ready to take back the books and refund my amount.. It is totally a cheating affair... Why should I keep two copies of the same book... I requested flipkart to refund my amount..... Need help because the amount is not small.. It costed me 1558/-...