[Resolved]  Bigbasket.com — irresponsible service for delivery

Very bad experience and not quit happy with the service. More over they don't know how to speak with customer. Please read below story.
I have order veggies and grocery on 19/may and selected the slot which they have provided (One of the slot is 20/may evening) on website. Fortunately i received the call from customer care on 20/may morning, conveying that my address is not able to track, when i have hear the comment from them then i got shocked because this is not my first order to delivery. They are asking me to change the slot but i told them for me it's difficult because the time slot is not matching with my time. (This is the main reason i have selected the sunday evening slot). When i disagree then they are more happy and saying that cancel the order and we give you 10% of amount. It means they don't want to delivery today slot?? So they are irritated me?? Lot of questions with frustration.

My point is, why slots are there in website?? To make people fools?
Why do i understand the big basket, do they are understanding the customer requirements?.

Very very bad response from bb employee and not happy.