Mobikwik — Bus trip was cancelled by the operator, need refund

I booked a bus ticket using mobikwik app,
From: chennai.
To: madurai.
Trip date: 23 june, 2017.
Bus operator name: sri renugambal prathika travels
Ticket pnr: 72zub3yh
Operator pnr: 72zub3yh
Total fare: 800.00.
On the trip date (23 june, 2017) i received a message that the bus operator cancelled the trip due to some reason.

Need refund amount.