I called back the number (07) 3547 7319 and reached vm that said I reached Pareto Fundraising

My partner answered my phone whoever it was on the other end just hung up

I got 2 calls from this number today. 1 in the morning, 1 in the afternoon, just then. I missed first one and I picked up the second one, the person hang up.
My Samsung phone identified the caller ID as "Suspected Spam"

Caller: Pareto Fundraising

They have called me on 3 different numbers now. If I actually answer and they don't talk straight away I just hang up anyway.

I had two calls from this number today but my Samsung phone came up with Potential Fraud so I didn't answer it.

Claimed to be from the Australian Conservation Foundation. I hope to god it was a genuine fundraiser because I donated via my credit card. (I see in comments above that this number is from Pareto Fundraising, a non profit organization).

I think it is the Australian Conservation Foundation, via Pareto Fundraising. (I had 5 calls from this landline & a mobile number)

I didn't answer and blocked this number as Spam

I've received repeated calls from this number, but never answer the call.

Repeatedly calls, I never pick up.