Flipkart - for not delivering my product even after extend date

i ordered a mobile from flipkart at *rd october ****which cost ***** after applied an offer . the delivery date was showing *th to *th october **** but somehow it extended the date till**th october .but till now i didnt get my order .i called to flipkart costumer care but the are only saying like if u are facing any problem than u can cancel the order after that you can get a giftcard voucher for again ordering the same product .but the problem is price of that product has been high now this product is getting at *****.

pls help
my order id is OD******************