Having read each of your three (3) posts concerning your Plan’s Executive Committee et al, my advice is to make your fellow Owners aware of what’s going on, and to then go for broke by attempting to secure sufficient support from enough of those to force the Secretary to convene an Extra-Ordinary General Meeting (EGM) to then trash-out all the issues.
To do that you’ll need what amounts to a petition setting-out the Motions that you want discussed at an EGM, such as tabling any EC Minutes, filling vacant E/C positions / appointing a new E/C, tabling quotations and amounts expended etc etc., and you’ll then need to have that signed by a minimum 25% of the Owners in your Plan, with that percentage calculated as the total units of entitlement applicable to the signatory’s Units / the aggregate units of entitlement for your Plan.
The detail is shown at Sch 2 Clause 31(3) of the NSW Strata Schemes Management Act (1996).