This would, imo, classify as an urgent repair. tenantsvic.org.au says:

Urgent repairs need to be done as soon as possible. If they are not done urgently you can apply to the Victorian Civil and Administrative Tribunal (VCAT). It will hear your application within 2 business days. If any repairs needed are not urgent the rental provider has 14 days to get them done.

IDK if I would classify Thursday as “urgently”, but VCAT won’t look at anything you send them until Tuesday or Wednesday.

I’m sorry, it sucks to be a renter, I know.