Buses always late (C3 Rissik Street Route)

We have a problem with C3 Buses using the Rissik Street Route they are forever late by 30 minutes when we ask the drivers they are forever telling us that they are on time and the supervisors also say that they are not responsible for this route. The Supervisors do not take us seriously and we are forever late at work as a results of their incompetence we are not late comers at work this is not acceptable.