Himachal Road Transport Corporation [HRTC] — no refund received for hrtc volvo bus from manali to delhi on 18th aug 2019 due to road damage because of incessant rain

My volvo bus from manali to delhi was cancelled in the last minute due to road damage because of incessant rain in manali area on 18th aug 2019. With great difficulty i was able to travel back to delhi by sharing a taxi with other passengers. I have to pay a huge amount for that taxi. I wrote an email as advised to [protected]@gmail.com on 18th aug and received a reply from the regional manager to send them the copy of the tickets and my bank details. I have send all the details to the same email id. But till date i have not received any refund. No one is answering on the numbers provided in the email. It has been two months now but i still have not received the refund. I am attaching copy of my ticket and also the new paper clipping of the road condition of that particular day. Do please help me with the refund as who to turn to next. Many many thanks.