Hi Jason11,
Yes, the Qld police service seem to respond like that when someone reports a crime.
Here is QLD stalking legislation:
Criminal Code 1899
They have an obligation to uphold the law. I suggest you complain to them every time this person contacts you. They'll probably continue to do nothing. After doing that a few times, escalate to the officer in charge of the station, tell him about the problem. If still nothing happens, make a formal complaint to the CCC. Complain that the police failed to investigate, failed to uphold the law.
Hopefully along the way somewhere the cops will do their job and drive around to where this person lives, ask her some questions and she'll cease.
Regarding your passwords:
1500 attempts mean she is doing it manually. Not using a password dictionary cracker. I suggest you include numbers and punctuation characters in your passwords. I suggest you use different passwords for different systems.
You should probably use 2-factor authentication.
Google Authenticator - Wikipedia, the free encyclopedia
I hope this helps.
Regards,