Tamil Nadu State Transport Corporation [TNSTC] — refusal to accept rs.10 coins

Address:

600005

I was traveling from arakonam to sholinghur by tnstc bus and tendered rs.10 coin. The conductor has refused to accept the same and informed that they have been advised not to accept rs.10 coin. When rbi has clearly informed that rs.10 coin is a legal tender why is not being accepted by the state owned transports? If this is the case, how will the public get confidence of accepting rs.10 coin? Is there any possibility to take appropriate legal action against tnstc for the refusal? I don't have the ticket, but have the details of the conductor and the bus number.