I’m sorry to say Sydney Cider that you don’t understand the strata law.
The levies are determined at the AGM and that is the only notice required by law. The meeting determines the quantum of the levies and when any instalments fall due. The usual practice in strata is for the treasurer to send a reminder notice to each lotbowner as the instalments become due.
The strata act also states that levies not paid more than one month late are charged a 10% per annum interest. This is not a charge the strata manager can waive.
If there are other late fees, they need to have been set up as a bylaw.
The only exception allowed under strata law is thst the OC can add the fees for collection of the debt. But this needs to have been passed at a general meeting.
Yep it’s tough when you get these surprises, but it seems to me the strata manager is just doing his duty.