When you enrolled in your units, you accepted that you would be available for classes between 8am 10pm, Monday to Friday, on each campus. As long as your classes are scheduled between those times, the University is not contravening policy. Classes can also be scheduled on weekends where necessary.
However, you can submit a Class allocation request form up to 2 weeks before the start of class if you can't attend your allocated class due to extenuating circumstances. The faculty will assess your request and provide an outcome within 10 business days.