I ignored their calls for a week, then finally answered one to tell them I'm on the Do Not Call list and to stop harassing me. They say they're Foxtel but they hang up as soon I try to have a conversation with them. Pretty sure they're a scam, I just don't know what the scam is. I've seen a huge uptick in spam SMS and emails, too, so I guess they bought my details off a hack list. Other numbers they call from:
0488 466 715
0488 466 806
0488 466 532
0488 466 726
0488 466 524
0488 466 746
0499 488 121
0488 466 592
0488 466 674
0488 466 721
0499 466 058
I get three calls a day. One around 12-2pm, one around 2pm, and one 6-8pm.

don't call again.

Caller: Foxtel

call from 0488 466 715 - foreign accent guy trying to get me to connect to Foxtel

I rang once and got disconnected