Flipkart — Inefficient shipping executive

Address:	Bangalore, Karnataka, 560066
Website:	Flipkart

I had ordered a router and it was scheduled to be delivered today i.e., 4th july. the executive gives a missed call at 7.15 and then i receive a message the executive was unable to reach. now his phone is switched off. they also do not have any proper time to deliver. should we wait entire day leavig our job to sit and check delivery?
This is not the first time and has been happening to me or my friends almost every time. if your executives are that inefficient to deliver an item then do not write an expected date while buying a product.
Now i know why people are preferring amazon and others over this damn flipkart. worst service!!!

P.s.:- executives are entitled to deliver an item as scheduled. if they cannot for their own reasons, they do not have the right to harass the customers.