Scammer from telstra

Caller: Indian from Telstra saying internet security team

Told me my internet security was not validated i said what do you mean the scammer said this is Telstra Internet security and we can see that your security has been compromised, i said wow this is very efficient service the only problem is i dont have a telstra account and the person swore at me and hung up.
tried calling the number back and it was a deadline.