a recorded message claiming to be from Telstra stating there has been a security breach on our internet router and to push #1 to repair or #2 to hang up.
I hung up and they called back within a minute but this time there was no message just dead air.
don't press anything just hang up.

A recorded message that said my internet was corrupt, i hung up straight away..

Automated speech telling me it's Telstra and that there's been a security breach on my internet...push 1 to fix it or push 2 to hang up.
LOLOLOLOL