Zomato food delivery - Food not delivered and amount also not refunded

I was ordered food on **-**-**** in zomato and paid amount by using credit card. Zomato person called me and said reached my location to deliver food. I went on the road and search him but not found. I called him, he said the location which was *kms before my location and he told that his app was the location where he was. When i book food i was choose address which was saved before and many times food was delivered. Zomato was cancelled my order and not refunded my amount. I was try to contact zomato customer care many times but i call did not connect. I was send message through twitter (by tweet). Zomato gave reply that they will refund my amount with in * to * days. ** days completed but money not refunded yet.