Karnataka State Road Transport Corporation [KSRTC] — No standard way of issuing tickets to children

My daughter is 11 year old and I had if proof . While boarding bus from Mysore - bus number KA 40F 1141 non stop Bangalore conductor and ticket issuing people started playing games . First they asked if we have id proof when we were ready to show they said it is based on height and charged full ticket because her height was little more than red line which was torn and not clear . Really not acceptable by KSRTC