A global telco that failed to stop more than 1,000 scam text messages from reaching Australians has faced no consequences, the ABC can reveal.

HSBC customers who became victims of a long-running "spoofing" scam hope the bank will take full responsibility for its "system failures" in Federal Court this week.

The Australian arm of the international bank admitted it had failed to protect its customers from criminals who scammed them out of their life savings.