Can't return after maternity leave..

[Pandora]

ETA: Apologies in advance for information overload - this is an issue I am extremely passionate about.

They have to offer you a comparable position to the one you prevously held, or make you redundant. They cant offer you one day a week if you were full time previously, and then use that as evidence that they tried to obey the law.
I would get legal advice as soon as possible, preferably before your meeting with them.
Also have a look at the Victorian Industrial Relations website and maybe contact someone there to see where you stand - its really important that you know this before you go in to the meeting with them so that they cant pull the wool over your eyes.

Also look at this

Victorian Equal Opportunity and Human Rights Commission
Contact our free and confidential Advice Line: (03) 9281 7100
TOLL FREE (country callers) 1800 134 142
TTY: (03) 9281 7110
Email: information@veohrc.vic.gov.au
Free interpreters are available on request

[mrscricket]

Thanks RayRay - i have submited a email to the Industrial Relations website stating what has happened and they will get back to me. Thanks very much for the link