Bigbasket.com — non delivery of products

Pathetic service first of all!! For a working professional like me who has to plan for buying groceries and planning the delivery, i selected the slot 7-9:30am, it was not delivered. Called up cust serv four times, was put on hold for more than 10mins on one call, then one rep assured me it will be delivered on the same day in the evening. Not delivered. Then i changed my slot to morning for the next day. Not delivered. Then cust rep again told me it will be delivered in the eve 5-7pm slot. I order and put these slots for my convenience not for your convenience!!! Pathetic!!! I will never ofer from this app again. I have lost a whole week or ordering and planning for the delivery. My delivery slot was changed 4 times!!! I would understand if it happened 2times but 4times??? Even if you blame it on technical issue it only shows but bad your team is.