Telangana State Road Transport Corporation [TSRTC] — refund of ticket amount

Today i boarded bus number:ts 09z 7660 an a/c bus at kothaguda, there were passengers who booked the ticket for ecil, last stop of the bus. However, at madhapur tyre has been punctured and we asked to vacate the bus and board another ordinary bus, the difference in fare between a/c bus and ordinary bus is three times, we were denied our amount. We do understand technical issues but since the fare paid by us is for the destination but since we didn't reach the destination atleast minimum 50% or 75% of excess fare has to be refunded. Kindly consider the request and arrange a system for refund when failure is due to technical unexpected reasons.