MakeMyTrip India — Lower bus type is provided and refund requested

I booked (2 passengers Seat No L2, L3) bus ticket in Apple Travel through Make my trip from Chennai to Coimbatore on 20th @ 11 pm. It was a AC sleeper, bus got repaired in Chengalpattu around 1am and we got other alternative bus non ac non sleeper @5.30 am. Such a worst trip . We were struggling with our one and half years old baby. I could not initiate refund. Make my trip should refund the excess amount collected from the passengers.

Kindly do the needful