Caller: An Indian guy

Said he was from Telstra.
I said I am fine with my Telco and please take me call list.
Says: "This is not how this works" - Talks about my internet connection.
I stated: "I don't have a internet connection" - which is true
He calls me a lair.
I now start having fun with the guy going back and forth until I simply said:
"What are you trying to achieve out of this phone call"
He swore at me and hung up.