Assuming this number is a political poll. It's been calling ever since the Federal Election has been called. No message left as it can't get through the Telstra Call Guardian message. Have now blocked.

Never left message so blocked number

Caller: Netsip Pty Ltd

Looked up number on Truecaller and Googled company name:

The ACMA directed NetSIP Pty Ltd (NetSIP) to comply with Australia's phone scam rules after finding it breached its obligations to monitor, share information, and report scam calls, including failing to share information about nearly 47,000 scam calls with other telcos and approximately 500,000 scam calls with the ACMA

Scam solar call

Scam caller number been reported