Zomato — cheating and insulting customers

Address:

Andheri east., Mumbai City, Maharashtra, 400093

I want to register a complaint against zomato.
Their customer service is extremely unprofessional. When we place an order they ask you if you have any special food preparation instruction. I mentioned that i do not want any cauliflower in the meal. Mentioned the same multiple times. All that i received was full of cauliflower. When questioned they simply said we cannot do anything about it.
They accept orders and then after an hour of waiting they cancel without any proper justification.
There is no contact number where we can call them. Only chat facility which is extremely useless.
As customers we face so much problems and they do not provide any resolution.
Kindly help by taking strict action against them.