Question for Labour Department

I am working at LETAP PHARMACEUTICALS LIMITED. And we are facing many problems in the company, which does not match with the labor laws of Ghana.
We start work at 7:00am and break 12:00pm-1:00pm and work from
1:00pm-4:00pm if there is no overtime.But if there is overtime, we work from 1:00pm-7:00pm.
But this days our FACTORY MANAGER said no one should go out to either urinate or go to toilet from 6:00pm-7:00pm.
So I want to inform the authorities to help us so that we can live harmoniously in the company,so that our right as workers can be maintained.