Unknown telephone number called left no message. Suspected spam call.

I picked up. No one said hello. The caller hung up within a few seconds.

Didn't leave a voicemail. Hung up after 3 seconds when I called back.

Last night notification of missed called from (03) 5212 9071. True Caller app blocked call coming through, just received text notification of missed call. Blocked the number in Android also. This morning another missed call from (03) 5212 9071. They've realised I've blocked this number and have now tried to call on (03) 5212 9077. True Caller app blocked (03) 5212 9077, and I blocked it on Android, so I won't receive text notifications of missed call. Cat and Mouse. Sick of it.

No one spoke, hung up in few seconds

After a pause, they knew my Surname and mobile number but sounded like a scammer or trying to sell heating with a $3,400 rebate. I asked where they got my number and said I wasn't interested and to lose my number etc.....they hung up.
Also goes under the number (03) 5212 9082

Who was this who called