Himachal Road Transport Corporation [HRTC] — regarding excess bus fare

On dated 18/8/17, I traveled in HRTC bus No HP-69-A0598 from Nadaun to Hamirpur.
distance =28 KM
Bus fare is 28X1.44=40.32 +2.00(Insurance Charges)=42.32 rounded to Rs =42.00
Concession of Green Card i.e. 25% total concession=42.32 X25/100=10.58 rounded to Rs=11.00
Therefor total Fare Rs 42-11=31.
But the conductor has charged Rs 33.00
the bus conductor has charged unauthorized/excess bus fare from me and made fun of me that it is matter of Rs 2 only. My issue/matter is not of Rs 2 but it is a matter o[censored]nauthorized /excess fare and request for justice and penalise the defaulter.The bus No is HP 69 A 0598. It was going from Dharamshala to Bilaspur. It left Nadaun at 5.15 Pm to Hamirpur. it was of Bilaspur depot.
My Name is Raju Kashyap
Mob [protected].
email : [protected]@gmail.com