Calcutta State Transport Corporation — Bus time maintaing

I am a regular passenger of CSTC. There are few bus in the route S24 but CSTC seen in their website that their two bus's difference 18 minutes. The bus driver and conductor did not maintain any time table. when they start journey from howrah they maintain 30 to 45 minutes gape. But in the returing time near about 3.30 to 5 pm there are no bus (left one or twice days in a week) for returning howrah from ajaynagar. I also told this condition to the ticket checking officer of howrah. But they did not take any action.
So, i therefore request to the CSTC higher officer to solve the regular problem.