Another call from a 03 4100 04XX number with the last 2 digits changed.

I got them to stop by picking up the calls but leaving the phone on the desk til they hang up. So it starts costing them. After ignoring 9 spam calls it only took two pickups and they stopped.

As usual, rang for 21 seconds, did not leave a message. Too many of these calls since answering a few questions for survey, never again