Olivia said she was from the Government Telecommunications Regulator-wanted to ask me questions about NBN and confirmation that I was already using NBN. I said I would call her back. She said "Not possible, I'm ringing you on a VoiP phone"

Said they were busy and couldn't take my call, this was on several times I called back

I called back number (02) 8097 1955 reached voice mail but did not say from what company.