Maharashtra State Road Transport Corporation [Msrtc] — refund not received from 21st mar 2019

I had made bus booking on 21st mar 2019 at 12:50 which was cancelled by me. I have still not received refund for same. I could see the cancellation voucher generated at msrtc but still refund has not been processed.

Transaction details:
Bus type: shivshahi
Route: mumbai central to guhagar
Boarding point: kurla nehru nagar
Aligning point: chiplun
Date of journey: 25th march 2019
Amount debited: 765
Ticket number: 36760951
Cancellation voucher no: 36805520
Expected refund amount: 631