suggest this person run an internet search on the mobile number it states its a court bailiff, I have spoken to this guy when he rang me on something, I ran a check on the number and rang him back, he was respectful and helped me sort out a matter, maybe you were aggressive to him?

I checked he is licensed with office of fair trading as a field agent he is also a federal court bailiff and a district court bailiff, apparently he was a magistrates court bailiff until 2017, web site for cairns district is not official site is a site run by bailiff not the courts so information is not official

The website you are talking about is not correct. Maybe confirm his credentials with the local courts. He is a debt collector