Unfortunately you have to claim damage to your property on your own contents insurance. See https://www.fairtrading.nsw.gov.au/Tenants_and_home_owners/Strata_schemes/Repairs_and_maintenance.html
The floating floor may or may not be your property. It depends on whether it was built as part of the original building or whether you or a previous owner added it.
If it is original then the OC must repair it under Sect. 62 of the Act. If it was added later then it is yours and you have to claim it on your insurance.
Under the circumstances you may be able to ask the OC to cover your insurance excess.