Karnataka State Road Transport Corporation [KSRTC] — conductor did not return the change

Address:

Bangalore, Karnataka, 560100

I boarded a airavat volvo ac ksrtc bus from mysore bus stand today 11nth november 2018 sunday at 4.00 pm. Bus charge was 280 rs and i paid 500 since i had no change, the conductor took the amount and issued the ticket saying he will give the change while deboarding. When i got down in deepanjali nagar and requested for change he returned only 20 rs instead of 220 rs. He said that he has already paid me 200 to me and the nearby passenger but he had not, i gave him the ticket and asked for 200 rs he said he had already given the amount and started the bus without. Returning the refund and ticket
Bus details : trissore to bangalore bus
Ticket amount from mysore : 220 rs
Date :11.11.2018
Time when bus started from mysore: 4.00 pm
Time when bus arrived at deepanjali nagar metro station :8.28 pm
Conductor details: driver only was collecting the ticket, there was no conductor and he was promising with every passenger that he will issue the ticket later.
My email id : hasu.[protected]@gmail.com