An apology is the very least you are entitled to. I am sure there are ambulance-chasing lawyers out there who would love to give your EC members a run around the paddock in an attempt to get damages out of them too. It’s not a course of action I would recommend and I would point out that there is no obvious remedy under strata law (it would be a civil matter).
There’s also the fact that you could at any point have taken your Owners Corp to the CTTT to force them to fix the ceiling. That option was always open to you although I accept that it may not have been obvious to you that it was.
I think if i were in your shoes I would send them a polite letter asking for a public apology, their resignations, the dismissal of the strata manager (who is either incompetent or dishonest) and a payment of several thousand dollars to the charity of my choice.
I feel better already for just having written that.