@anncardy7 everything is available online po. Here's what's DIBP says about refunds:
Will I get a refund if I withdraw my visa application?
Your visa application charge will be refunded if:
your application was unnecessary at the time it was made
your application is made because of a mistake made by us
the applicant dies before a decision is made.
You might also be given a refund if your visa application is made by mistake, for example if you apply for the wrong type of visa. You should ask for a refund in your withdrawal letter.
You will not be given a refund if you:
change your mind about continuing the application
do not satisfy a criterion for visa grant
claim it was a mistake to have applied because your visa application was unsuccessful (that is, you state that you would never have applied for this visa had you known your application would not be successful)
believe after your visa application was unsuccessful that you applied for the wrong class of visa
link: http://www.immi.gov.au/FAQs/Pages/can-i-get-my-visa-application-charge-refunded.aspx