Suspected spam.

The man claimed to be Telstra, They detect there is an external device using my internet. It is dangerous to use a laptop or computer, etc.
But actually, my home does not have the internet at the moment. I told him that, he hang up

Caller: Unknown

Rung, picked up, there was a lot of beeping, they then hung up

Claimed to be CBA fraud that are seeing suspected transaction on my account then pretended to cancel them when I said they not mine. Then started asking if I gave my password to anyone, obviously not. Saying all the right things you would expect from the legit fraud department until they started asking if I had telephone banking.
Never gave any bank details info away and carful not to say yes in any response and kept challenging them on how I know they are actually from the bank, eventually they hung up.
Suspected scam for sure.

Suspected spam. Didn’t answer, no voicemail left. Live in SA, no reason why an 02 number would be calling me.

Suspected spam