Caller: no idea. no voice. breathing and office noise in background.

Rang, I answerer " hello " silence.... office type noises from what I think were telemarketers calling people. Probably a scammer

Caller: Centrelink

Answered phone, some man who knew my name, & said he is from centrelink & that he needs to verify who i am..? & asked me to tell him my name, address, d.o.b. ? I asked what is the nature he calling me about, & he couldn't tell me until i answered all these more questions. I had the number checked & it is non existent.

unsolicited call -at least spam and probably a scammer

Hung on to see if I answered, I could hear the person breathing, yet did not say anything.
A WOFTAM.