Australia phone or internet bill dispute: where can I complain?

If you have tried to resolve a phone or internet billing problem with the provider and it remains unresolved, the Telecommunications Industry Ombudsman can handle many complaints about billing, contracts, service quality, disconnection and related issues. Keep bills, account records, screenshots and complaint reference numbers. Official source: Telecommunications Industry Ombudsman. Guide: https://getinstantlaw.com/utility-telecom-billing-disputes