MakeMyTrip India — car hire from mangalore to goa

This was booked well in advance and advance amount was paid! The journey was on 13 august. There was no road blockage or anything. Makemytrip cancelled at the last moment putting us in deep trouble and almost spoiling our plans. I finally got an alternative my paying twice as much. Who is responsible for this? We had already paid for the hotel a non refunable rate. So how can mmt cancel at the last moment a long distance car hire. What is the use of booking with a so called reputable company like mmt where they can cancel for no reason? This is fooling people.