D-Mart / Avenue Supermarts — Order undelivered and not cancelling even told 2-3 times

We have placed order on 4th of July, which was not delivered till 7th july, on calling customer care they are just giving false committed of delivery. On calling the delivery agent for delivery, his response was my shift is over so icant deliver the order.
So i have cancelled the order on 7th july, but still status is showing as undelivered after 24 hours. Also receiving calls from dmart ready that we will deliver the order on next available slot. Customer care executive is saying they need 24 more hours for cancellation and ignore the mails or calls we are getting. This is mental harassment fromdmart ready and they are using my money from more than 4 days.