Hi Mandy
I am sorry to read your news.
Please see this link, but bear in mind that your employer may be able to claim the Regional Concession, which allows for a lower salary level of $37,000 odd:
Temporary Business (Long Stay) - Standard Business Sponsorship (Subclass 457)
Be a little careful of making waves without getting proper advice first.
Do Not go anywhere near DIAC either at this stage.
There was a case last year where one of the rort employers (rort is Australian for "exploit") imported a load of workers from China on 457 visas with promises of rich pickings in Oz. None of them could speak a word of English so the applications were obviously faked in some way.
When they got to Oz, the company treated these Chinese workers mercilessly badly and threatened them that they would be deported if they blew the whistle to DIAC.
Eventually one of them couldn't stand it any longer so he blew the whistle to DIAC all the same. DIAC went blundering in to the situation with all the airy brains, sense and sensitivity of a duck billed platypus with flat feet, which is typical of the thick-witted Civil Service the world over.
They shut the company down as soon as theiy realised that the worker was telling the truth. Then they turned their attention to the employees. They deported 6 of them (because shutting the company down automatically cancelled all the 457 visas) on the grounds that these guys had no English before an MP and a Human Rights Group got involved and rescued the situation for the remaining workers.
Therefore I would say that if the Migration Agents whom you used were in Perth, either go back to them or go to Stephen O'Neill of ISCAH before you do anything else. Stephen is in Perth. His website is here:
Contact Us
I doubt that a Trade Union wuld be your best bet at the moment because they won't understand the visa end of things and if you are inadvertently dealing with rorters, a Union might simply serve to make matters worse.
If it were me, I'd definitely be starting with a good, strong, Registered Migration Agent on this one.
I will try to see if I can get one of our Agents to give you some better help about this.
Best wishes
Gill