That section requires a special resolution, and that resolution needs to be before the fact.
Ask to see the minutes of the general meeting where this was decided.
Even if they show this, I would challenge them to show that the required number of votes for a special resolution were recorded, and I’d look, at the wording of the motion.
The wording needs to be reasonably specific about what is covered.
Not withstanding the above, I would contact your strata insurer and lodge an additional claim. You are perfectly entitled to do this as an owner, and don’t require the permission of the committee or the strata manager.
If a claim for the other damage has already been lodged, there is no need to pay a further excess.