Karnataka State Road Transport Corporation [KSRTC] — Delayed bus and inappropriate behaviour.

My name is rameez I had booked a bus from Hubli to kalaburagi departure 10:30 pm from Hubli to arrival at 06:50 am at kalaburagi. I had booked for my pwd exams which are scheduled by 08:50 am.
Where as the bus delayed by around 1-1.5 hour delay and as per conductor will be reaching by 09:00 am due to which I’ll be missing my exam.
Bus no f:2513 Karnataka sarige seat no:34. Due to which I am travelling through other bus with higher cost. Please refund me my money. And please make sure this never happens again.
Thank you
yours sincerely
Rameez k