Just called me, I didn't answer
I no longer answer any calls to my mobile, unless they are in my contact list. Figure if it is important, they'll leave a message.
On my landline, I have my beloved Call Guardian, so don't get any spam at all. Best thing since sliced bread! I do wish someone would invent an app for the mobile that works the same way!

Someone called me on this number so I decided to call back the number does not exist I believe it’s a Way or a scam to take off your credit out of your phone if you answer it

I called back number (03) 8103 2004 it says the number I have dialed is not in service anymore.