Asian caller claiming he was calling from Telstra technical support service about the computer problem I were having.I asked him "Which computer was the problem with?", he didn't add which one it was. I informed him "Telstra never call regarding technical difficulties unless instigated by the user with a service difficulty complaint.", I added that he must be a scammer whereupon the call was immediately terminated by him.

Apparently Telstra Tech support, but when called out as a scam they hung up. they keep calling every day

Scam caller pretending to be from Telstra.

Indian call centre chatter-wallah claiming to be the Telstra technical department, saying my internet will be cut off tomorrow.
Sounds like another low-life Indian criminal scammer.