We entirely agree with Jimmy’s advice. It may be useful for you to engage a building consultant to walk around the building with you and provide you with a detailed list of repair and maintenance items that need to be attended to.
The law is very clear in relation to the obligations of Owners Corporations to repair and maintain common property, which is set out in section 62 of the Strata Schemes Management Act 1996.
In approaching, at first instance, the strata schemes adjudicator for orders that a compulsory appointment of a strata manager be made, that appointment is made under section 162 of the Strata Schemes Management Act 1996. It is one of the few areas where an owner making an application (such as you) does not have to go through the hoop of mediation prior to making the application for a compulsory manager.
As Jimmy says, its amazing how such applications can shift the mind sets of recalcitrant Executive Committees.