Airservices are not responsible for the fuel, but they are responsible for Notices to airmen...
Not sure what your point is.
Do you think Airservices has personnel checking the status of every facility on every licensed aerodrome every day??
Even at controlled airports, Airservices has no involvement in the fuel services available.
The aerodrome operator is responsible for notifying the NOTAM office if services are reduced below that as per ERSA, and what they require as far as pilot notification goes.
If you consider they are not taking appropriate action, advise CASA.