Zomato — failure to fulfil the commitment

I placed a prepaid order at 22.53 on 23.09.2017 for delivery of food. The delivery time at the time of placing the order was showing as 45 minutes but after placing the order it was showing as 90 minutes. I raised the issue with zomato customer care service and they accepted that there was some issue with the expected delivery time and assured me that food will be delivered against my query whether the food will be delivered or not. However after inquiring about the delivery and their so called reply of keeping patience, the food could not deliver. When i raised the concern with them they simply come out with a solution and refunded the amount as zomato credit. Now when i said that i will lodge an f. I. R against them, they initiated refund to be credit in next 5-7 working days. Now my query is why they should not be penalised and why i should not be compensated for the suffering i went through. I had to sleep empty stomach because of their false commitment.