Tamil Nadu State Transport Corporation [TNSTC] — Change for ticket

I am giving 100rs.for ticket amount in Tirunelveli to Tenkasi ac bus The ticket charge is 72 but I give 100 but he ask for 2 rupees I don't have a change he relied very rudely and ypu must bring 2 rupees but that time only I take amount from atm so I explain but he didn't accept it my co passenger give me 2 rupees and then he gave remaining change