Delhi Transport Corporation [DTC] — Complaint About Conductor's Aggressive Language and Money Returning Attitude

Sir/Madam
Today I boarded an orange DTC 711 bus from Atma Ram Sanatan Dharm College (near Durgabai Deshmukh Metro Station) to Uttam Nagar around 12pm to 1pm. The number of the bus was DL1PD0849 which was written on a sticker of e-bus ticket.
I gave the conductor a hundred rupee note for buying a ticket of Rs15 to Uttam Nagar. But the conductor didn't give me the balance money at that time and told me that he would give me the balance money at Uttam Nagar. He had told the same lines to two-three other passengers also.
At Uttam Nagar, I asked for my balance money but he told me that he didn't have the balance. But he had a bundle of ten-twenty rupee notes in his hand still he was not giving my balance money.
Then I searched my pocket and managed to give him twenty rupees. Then I asked for my balance Rs5. He told me that he would give my Rs5 after getting change from somebody at Uttam Nagar Terminal and started using aggressive language and was in a mood to frighten me so that I didn't ask for my balance money. I told him that I am only asking for my balance money.
At Uttam Nagar Terminal, he took out a 5-rupee coin from his bag and gave me.
He had a lot of balance in his bag, still he was not returning the balance.
Kindly tell such conductors to behave properly with passengers and return their money before the stops.