Unknown number, no message left. Possible junk call.

Caller: (Fake) Telstra internet worker/manger

Called in to say he was from telstra.
Reason why he called (he claims) was due to by internet connect? Checking, he has found we download a dangerous virus and wanted to make sure we won't need to hold responsibility if it isn't our fault/Intention that may cause the out internet to go down.

I told him saddly you called a business hotline and we have no internet, he hang up.