These guys are shoddy. I had booked some domestic within-india flights and my credit card was charged twice - even though their website page said "sorry, your transaction did not go through". They never cared to inform me and I got to know about this only when I saw my credit card statement.
After my reserviation did not go though, I did a reservation with the airline website. So my credit card had three charges for the same trip. When I called their customer service to get this rectified, they cancelled all the 3 bookings. This is despite me telling the rep a dozen times not to cancel my trip but only take care of my triple booking. My flight was at 1.30pm and fortunately I found out about the cancellation that day morning when I called the airline to confirm. I was on the phone for like 2 hours in the morning from like 7am to 10am with makemytrip trying to get rebooked on the flight.
They really made me miserable. I will never ever go back to them. Its better to do the bookings from the airline website since the prices are the same and the airline websites are a whole lot better than makemytrip. One big disadvantage with makemytrip is that they don’t accept international credit cards(card issued outside india). Pretty ridiculous in this day and age.
Addendum:
When I spoke to the rep about the triple booking, she said she would like to know my PNR for the booking I had done through the airline. She emphasized that this was only for verification and that she will not cancel it. But lo and behold, the next day morning my worst fears came true. Its amazing but makemytrip actually called the airline and cancelled my ticket. Upon calling the airline, they maintained that the guy calling from makemytrip had my PNR and other details and they had no reason not to cancel it. I was outraged by this invasion of privacy. In the US, a third party cancellation of this sort would not have happened. Fortunately the airline told me the name of the MMT rep who called in to cancel my ticket. This helped me convince the MMT reps that a cancellation had indeed occured and it was an MMT guy who cancelled it. If not, they would have denied they they ever cancelled it. This was a high stakes situation for me since I had an international flight the next day. Caused a lot of tension for me and my family. Not once did the MMT people feel apologetic about what they had done. I had to continually prove my position again and again.with the numerous reps.