Took my cue from the anonymous comment on 10/11/18 and added them to blocked senders list.

Caller: Claim from Telstra Technical Dept

Told me they were turning off my internet for a couple of hours while they fixed my problem. Wanted to know my internet speed. When i questioned them about not really being Telstra he offered me his employee number when i said it would be fake and he was not really be Telstra i was repeatedly told to f**k off.

Caller: "Robert Brown"

Indian scammer calling from Telstra Technical Department

Said they were Telstra "technical department " with usual stories to try to get me to give them access to my computer