Billardiera heterophylla (syn Sollya heterophylla) - Blue Bell Creeper is a garden escapee which invades bushland and smothers small shrubs and ground covers
There are two species that used to be Sollya heteropylls. Billardiera fusiformis is the climbing one, and more delicate. Its leaf margins are entire to wavy. Heterophylla is shrubby, rarely climbs, and is more robust. Its leaf edges are finely toothed.
A sample of this should really go to the National Herbarium of NSW in Sydney to determine whether this is Billardiera fusiformis or Billardiera heterophylla.