Telstra is being taken to court by the consumer watchdog, and is facing fines of up to $10 million and user refunds of $5 million after the telco allegedly charged its own customers unawares through a third-party billing service.

Telstra is being taken to court by the consumer watchdog, and is facing fines of up to $10 million and user refunds of $5 million after the telco allegedly charged its own customers unawares through a third-party billing service.