Flipkart — order status is not updated for days and not delivering on promised delivery dates

I ordered a product on flipkart with tracking id: FMPP[protected] on 21 August and product was shown with expected delivery date 25 August. It reached flipkart mother hub, Bengaluru and not left there for two days.either it got blocked there or they simply delayed it. I ordered the product only because of the delivery date which would be comfortable to be and the product is urgent to me for the coming few days.if it is still in Bengaluru then it cannot reach me tomorrow as average courier time taken from Bengaluru to my location is generally 2-3 days.then this would be the complete avoiding the consumer rights as they sold the product with promised delivery date.if they cannot deliver the product on that day then why should they assure it??Flipkart often changes the delivery dates on there own without thinking about the consumer. I would require the product atleast before 30th August .please do the proper arrangements to make it delivered as fast as required.