Caller hangs up as soon as you answer. Spam call.
One of many spam/marketing calls from the prefix of 02 9127 xxxx
Added to the growing blocked numbers list.

Get calls from this number often. Unable to block it (probably TPG's fault).

I had a call from this number and the caller was an elderly lady who left a message on my voice mail saying she was from Prostate something looking for donations. She was talking to my voice mail as if I had answered and kept saying "hello" and then "I can't hear you so I am going to hang up".