Zomato - Food not delivered

I have ordered food from zomato on **th december ****.
But even after waiting for two hours no valet was assigned and it was showing food is being prepared in the app.
The app only which allows chat kept asking to wait for more minutes and this never ended.
I slept empty stomach the night and in the morning I see it showed up that the order is delivered.
I try to issue complain again in the car box of zomato and they shamelessly recognize their error and say oops okay we are initiating your refund.
I asked them that only refund is not enough because I have been harrassed so I need to be compensated to which their executive replies that they can be also flawed as no system is perfect.
Is this a joke to them.
I want compensation for mental harrasment and sleeping empty stomach.
Because when we cancel a order which we booked erroneously they charge us whole amount.
They dont consider that even we can be flawed.
Then why shall we.
I need resolution.
They are terminating the chat by just saying we regret and sorry.
Help me.