Caller: Telstra Scam

Called to tell me my Telstra internet connection has changed from private to public so anything I was searching on the internet was now public information. She explained I needed to check my Google browser on my phone to change it. I told her that my mobile plan and home internet were not with Telstra and never have been, and she explained that Telstra is the main internet network for other companies and mine was one of them. I insisted again that my network is not with Telstra, and how did she get my number in the first place, and she hung up. I knew it was scam the whole time, but was just curious to see how she'd respond with probed - obviously not well.