The strata manager can usually really only act as advised by the committee but someone has made a judgement, different from yours, that this was not a serious enough issue to merit emergency attention.
If the strata manager is aware and has decided to do nothing (they will have certain powers to allow them to act in a significant emergency) there’s not much an ordinary owner can do.
I’d say at this stage your best bet is to wait until your next AGM and raise this as a reason why the members of your committee who made this decision should not be re-elected and let the other owners decide.