If it’s falling apart and it’s common property then you can take a Section 62 against the owners corp demanding that they at least repair it.
But Whale is right and I’m not sure that it’s too late to get this ludicrous situation dealt with. CTTT was a konga line of clowns and NCAT doesn’t seem much better. It’s time they had a clear-out from top to bottom. A kid with a computer could give you a better answer than some of these jumped-up wannabe Judge Judys