Zomato — zomato payment done, no order delivered, not refunding money

Address:

Mumbai City, Maharashtra, 400072

I ordered food from zomato on 31dec18. Order number [protected]. First they kept saying that it will be delivered soon, for at least 3 hours. It never got delivered. It completely messed up party at my place. Then i followed it up with them for refund for last 10 days but to no avail. They are saying contact their vendor for more details or getting order delivered now!! (It's placed 10 days ago).