In Qld our legislation says the property must be kept in good condition and structurally sound. So you wouldn’t think it would be a struggle for common sense to prevail but it is. I’d say your claim is legit if a 3rd party has assessed it as such. Can you ask your strata manager to come to your side, or at least give their advice to the matter. This might get them realising it’s not just you. Also, your local council might appreciate a call and respond afterward with some 3rd party directive which brings more folks into the discussion. Safety is a real issue should uncanny timing bring it down on someone and the cost to you on maintaining or renewing your insurance would also become a issue if the place is kept a dangerous mess. Knowing and quoting the applicable legislation can also put wind in your sails. Good luck!