Has called twice over the last week. No voicemail left and hung up soon after calling.

This number has called me twice in a week. My phone picks it up as Suspected Spam

This number claims to be someone running a charity to feed the poor.
They give a short spiel on how sad and unfortunate many people are living in Australia with no food and asking for a handout.
Con artist scam

Typical answer and nobody there, most likely spam caller