DO NOT ACCEPT PHONE CALLS TRYING TO GET ACCESS TO YOUR COMPUTER. EVER. NO EXCEPTIONS.
Regardless of how good they sound, they are a scam . Always.

Treat your computer like your underwear. NO-ONE gets in except you.

DO NOT GIVE OUT BANK ACCOUNT INFO OVER THE PHONE. EVER. No one should ask for access to your personal accounts.

https://www.scamwatch.gov.au/

NBN scams

Your internet will be cut off – phone call