MAKEMYTRIP (INDIA) PRIVATE LIMITED is working closely with MouthShut.com to enhance customer satisfaction.
Their customer service sucks. I cancelled my ticket and got a prompt refund in few days but it was less than what I should get. They paid me about Rs. 500 less. I have emailed them 3 times about it but no reply except one unhelpful automated reply. Always buy directly from Airline website to avoid these fraud agent companies. If not, go to a travel agent who has local office.
Also remember that MMT charges its own fees for booking and cancellation both. Plus their customer service folks are entitled to hang your phone!