@depression101
Sounds like you are in a difficult situation, but there is help! There is an organisation that helps people with their social security applications called Welfare Rights. They can talk to you and give advice and assistance on appealing Centrelink decisions. They have a group in WA. I suggest giving them a call asap today. They might get you to come in for an appointment (take all your papers with you - the Centrelink decision, doctors reports, financial information etc.) or they can chat on the phone
http://www.wraswa.org.au/contact/
Their phone number is: 08 9328 1751
My understanding for social security matters is to qualify you need to show you don't have much money (assets or income - they are different things) and, if claiming disability payments, you need to have evidence they will accept of your disability (Doctors reports). Depending on your age, you might qualify for the age pension rather than disability? I'm not sure how it all works with the appeal, but there are definitely groups out there that can help you.
Please let us know how you go.