Zomato — zomato rejected order - no refund

Address:

D-138B, laxmi nagar, street 5A, New Delhi, Delhi, 110092

They have rejected my order. Without over dropping me the mail. Even the chat server employee is not responsive when i asked about my order. He simply informed me my order is got rejected.
1) how can my order get rejected before time
2) if he had reached why didn't he ring the bell of my door.
3) why did i was not informed when i asked about my order before even it got rejected.

Zomato is not even providing the refund for the order i have placed neither delivered the order.

Order number: [protected]