I called back number (03) 5208 4125 just kept on ringing no one answered the call and never got any voice mail.

A total scam!!
Caller says they are doing a demographic survey and then tries to weasel information out of you to see to much you earn

I also believe this call is a scam. I have had multiple missed calls from this number. Today I answered the call. The caller had an Indian accent and identified himself as Mark Stevens from PL Solutions. He stated he was calling about my 'government benefits' but first he needed some further details from me. I stated I did not receive any government benefits. He replied that was OK - he would assist me to obtain them - all he required was further details. At this point I got very suspicious and demanded further information about his organisation as I was going to report him. It was no surprise he hung up. I can provide no further information but please be cautious and aware that this number is a scam.

Thsi number started calling 4 months ago. Just once every few weeks. Now it is every couple of days. First there was noone speaking when I answered. Now it is an indian accent (both male and female). Today they said they were from IPN finances. I have a silent number and am on the do not call register. In the last two weeks these calls are now either preceded by or followed by another call from an unlisted number and no one speaks when I answer that Initial/second call.
I always hang up straight away.
Hope this information is helpful to someone.
The number is from the Geelong area in Victoria (03) 5208 4125)

I call a call on my mobile but didn't recognise the number so I didn't answer it. No message was left. When I got home I rang them back from my landline and got an engaged signal. Genuine callers usually leave a message on your voicemail. I have blocked the number.

I have had the exact same experience with this number!!

I answered and when there was a long delay I hung up. They called back straight away with blocked number