Cox And Kings India — company cancelled the trip and not refunding money

Address:

Mumbai City, Maharashtra

My booking Id is 1115254 for the Dubai holiday booked on 19/9/19.After 7 days company called and informed that tour is cancelled and money will be refunded with in 7 to 10 days, after repeated reminder they mailed me that it will take 30 to 35 days.Till now money is not refunded and nobody is replying mails or taking phone calls, including Mumbai head office and customer care. How to initiate legal action against them. Please advise