MakeMyTrip India — hotel booking is total waste of money

This is chor company. I made the booking for phuket from mmt website today in the morning with the booking id nh7p[protected]. I forgot to select the meal and instead of 29/10/2019 check out i mentioned it for 28/10/2019. I dont have the option but need to get it cancel and make the new booking. At the time of booking the mmt given the voucher number of inr 2000 which i applied and balance amount need to make at hotel.in mmt website it is clearly mentioned "cancellation charges will not be applicable if it gets cancel by 22/10/2019".

When i am trying to cancel it now they are not refunding the discount coupon amount which i used. I spoke to mmt customer service in the morning and they are denied to return the amount of inr 2000.00. The mmt is try to use the discount amount which was given as gesture for my previous hotel booking and problem which i had faced. The lady argued with me and kept me on hold 3 times and didnt get the resolution. This company is totally try to take customers on granted.