Had a couple of missed calls from this number, they never leave a message.
I called the number back and a recorded message advised me that this number belongs to a company called "Clever Contacts".
Apparently they make contact with you on behalf of a charity you've previously donated too chasing further donations.

They keep calling, I don't answer unknown numbers but they were so persistant I googled the number, they are now blocked.

Caller: Clever Contacts

I have never provided my details to this company and have reported them to AOIC

Kept calling and calling at least 6 times. I finally answered and they hung up, only to have them call again within seconds and hang up. When I called back I got a voicemail message stating they were a company call "Clever Contacts".

I called back number (07) 3147 8112 reached voice mail for a company called Clever Contacts.

not interested