I really need some help with a plant identification
That's an Apocynaceae, from the species Strophanthus speciosus. Its common name here in Australia is corkscrew flower or poison rope.

It's not native to Australia, though: it's native to Africa.

You can easily identify it by the flower:



Flowers of Strophanthus speciosus in the Royal Botanic Gardens Victoria, Melbourne (source of the image)