Called back and got a message saying all of our agents are busy now.
Have had similar calls from similar numbers listed as Southport Queensland.
Don't answer them and they go to message bank without leaving a message.
Suspect that this is the same.

Called back and got a message saying all of our agents are busy now.

Didn't leave a message, went straight to voicemail asking for my details without saying who they were. Either suspicious or stupid, either way I'm happy to not call them again