spam caller who never leaves a message

Spam and they come to her house and u can’t call back
They sell ur number to sales teams

Called back to get an automated response in an American voice that the call cannot be completed.

Insurance crap....dont take no for an answer, so I have to be very rude!
Assured they will remove my number...but no, the calls keep coming day in day out!!
Do they not give up when I never answer the call?

answer and the it hangs up

As above.. they knew my first and last name and obviously mobile number. Told me they are a 'background sponsor' to a home owners promotion that I 'apparently' entered online. The competition was to win $1000 or an iPhone 7... and I 'won' an Android Tablet. Would have to attend a seminar for 45 mins and get tablet at the door.
Politely declined to continue. I smell a rat. Number now blocked.

Scam

Got my mobile no from survey I completed in response to “you’ve won an Android tablet... complete survey to receive” Financial advisor delivers it personally when you book in home appt for mortgage options / retirement planning / reduce tax options

Answers the phone then hangs up

Called twice but didn’t leave a message

They are trying to scam you into revealing personal information by pretending that you have entered into an online competition to win an iPhone or $1000 Woolworths voucher. This is a ploy to get you to sign up to their scam.

I called back number (03) 9067 6731 rang 3 times then goes to busy tone.