I called back number (08) 6214 4479 spoke to a guy who said company name is Pioneer Credit.

Caller: SPAM

[spammer] Called asking if I was a family member of "..." [my surname].
[me] I said there is no such person I know in my family by that name. I asked how they got my number,
[spammer] said it was on public record. Then proceeded to say the call may be monitored.
[me] I asked what business they were,
[spammer] they said they were operating out of Perth.
[me] told him since we already established that they have called the wrong number, there is no need to continue the conversation, and I will be hanging up. [doot doot]

Ambulance chasers, Debt collection agency purchased the debt at fraction of Australian banks disputed debt, bank has written off

Debt collection agency in WA working for greedy Australian banks