How late were you with the payment because the legislation only allows penalties if you are more than 30 days late.
(2) A contribution, if not paid at the end of one month after it becomes due and payable, bears until paid simple interest at an annual rate of 10 per cent or, if the regulations provide for another rate, that other rate.
But once you are over this period
(1) An owners corporation may recover as a debt a contribution not paid at the end of one month after it becomes due and payable, together with any interest payable and the expenses of the owners corporation incurred in recovering those amounts.
So if you paid within the 30 days you are ok, but if it was more than 30 days it’s debatable.