Caller: Telstra Customer Care

I had a call from this number today (26/2) and t was the same people from that I've had calls from with three different numbers and I think a scammer is using other people's numbers to call. The first call was from 0651799, the second was from a mobile phone number and the third was from this Perth landline number. It's been the same each time I have answered. A recorded voice says 'we have detected a problem with you Telstra internet line. Press 1 to fix the number or 2 to talk to a customer service operator.' I don't d either of these and it hangs up. I tried calling the mobile back and it was someone's private number. Just thought I'd let you know.