Thanks to other comments on this number, confirmed my suspicion it was Scam. Received a call from this number and also another call from a Thailand landline number. Don't know anyone in Thailand. This is obviously a scam trying to get you to answer either a mobile number or a number which would connect you directly as an international call to a landline number in Thailand. As I did not recognise either number I do not answer and delete the calls.

Scam stating they were from Commonwealth bank and my account had been compromised

Caller: phoney 'telstra'

said hackers were using my internet, said they'd sent me warning messages, the said F### O## B####

Caller: scam 'telstra'

said hackers were using my internet and they'd sent me warning messages.... then F### O## B####

Received call from this number - it was a recording saying that my Amazon Prime subscription was being debited from my bank account. Spam Call.