How can I show that I have exhausted all my options?
If you are in NSW and they have failed or refused to act for two months or more, then seek mediation at Fair Trading with a view to taking action at NCAT, seeking orders under a section 232 “failure to fulfil statutory duties”.
You might also suggest that if the strata manager doesn’t explain the facts of strata life to the chair, then you will also seek the appointment of a statutory manager under Section 238.
That should get their attention, at least.