Bangalore Metropolitan Transport Corporation [BMTC] — not returning the exact money

We had to travel in a volvo ac bmtc bus from tin factory bus stop to hebbal bus stop we were in a group of three. The ticket cost was rs 174 and i gave a 200 rupee note but the bus conductor instead of returning me rs 26 he only gave rs 20 when i asked him for 6 rupee, he asked me whether i have 4 rupee or not. I did not have 4 rupee so i said no, he said he will give near hebbal but instead of returning my money he made fun of me.
The non ac bmtc buses provide exact change for 1rupee also but the ac bus conductor fails to do this the time was 5:15 to 5:45 pm when boarded the bus at tin factory
Date and day of incident : 03/11/19 (Sunday)