Same thing happened to me, just hung up

blocked number as a voice mail message was left, message wasn't left by person, but automated recording that included 'press 2 to disconnect your internet'. Sounded suss - location of caller came up as Coojar, Victoria.

When I didn’t answer the call I get a weird recorded message. Voice sounded like a computer/ digital voice saying ‘if you want to fix up the problem press 1 to connect to Telstra. If you want to disconnect your internet please press 2’
Doesn’t sound right to me so have just ignored it....