Creepy breathing down the line.

Same as previous, voice mail full

Caller: Scam call

received call multiple times, answered once, no response, suspect scam

Caller: (02) 7202 0153

Called from this number and (02) 7202 0153 multiple times. I diddn't answer. Samsung Phone warned of 'Potential Fraud'. They never left a message. I didn't call back. Looks dodgy.

Guy pretending to be from Dell trying to gather information about our computer systems. On other calls, he has claimed to be from Lenovo.
Fraudulent, unsolicited, and potentially dangerous.
Do not answer or call back

Returned call, got - "The person at extension 0153 is unavailable - the users mailbox can't accept more messages"

I called back (02) 7202 0153 but the phone just kept ringing