Tamil Nadu State Transport Corporation [TNSTC] — Change of bus from AC sleeper to Non AC sleeper

Address:

bangalore

I had booked 4 tickets(3 upper births and 1 lower seat) from Bangalore to Dindigul in 9:30 AM TNSTC AC Sleeper Seater bus on 30th October.
Unfortunately the bus was changed from AC Sleeper bus to non AC Sleeper bus in the last minute. Since I was travelling with my family, I could not cancel my trip.
Hence request you to refund my difference amount that I paid for AC service while comparing with the Non AC service provided to me.