My landlord is frauding centrelink and withholding my bond money, help?

About a month ago I found a guys apartment to move into, he is the owner and I am renting a room. He is on a disability pension. Anyway, he asked me to move in and I said yes. He asked me not to tell centrelink that I am moving there as he doesn't want them to know he claims rent and want it to affect his payment. I am a student and require rental istance so I just put my postal address as my parents address, however centrelink mistakenly sent me my health care card and he found out and is pressuring me to change my address. I am scared of him, I had a lease agreement which we both signed in which I put in my desk my drawer in my room. The other day the drawer fell apart, he offered to glue it back together... When I got home after 2 nights at my boyfriends apartment, I realised the rental agreement was gone, this is what I would have used to tell centrelink that I am living there to claim my rent istance. My dad called him and he has agreed to let me move out with 2 weeks penalty, however I never gave my dad the consent to make this agreement. I am wondering, what should I do? Should I consult a lawyer? If I take the rent he is offering, will I still have claim to the 2 weeks, which I don't agree with as what he is doing is clearly illegal (I studied a law cl in university, any illegal or fraudulent contractual agreements are void, so I have every right to tell centrelink that I live there). Anyway, how do I obtain my money? I have no proof as he stole my rental agreement. I am too scared of him to ask for it, as he might know what I am going to do and refuse to give me any money. I have no family in this city and there is no way in hell I am able to obtain another 4 weeks rent for a bond out of no where, so I am in a very tough position. Can someone please give me advice? Australian Law - more specifically Victoria.