Zomato — undelivered order and no refund for a mistake done by their delivery person

Address:

Chennai, Tamil Nadu, 600033

I have placed order on april 8, 2019.
I received a notification saying my order is on the way. The concerned delivery person called me and confirmed my location at 9:23 pm. But he didn't move from that place till 9:30pm. So i called him and asked about the delivery. He said he is going to cancel my delivery, someone will deliver it to me. Then i complained about this in zomato chat saying that my order is getting delay.

Within a few mins, i received a notification saying i was not available at the address so the order was cancelled.
And my money will not be refunded as the food was prepared. I have checked my address too it was the correct one.

This is such an upsetting experience from zomato so far. I have never felt this bad before. If they can't deliver also i can accept it. But he is telling some lie to escape from his mistake is totally unacceptable.