I buy auction house in Canberra, ACT. After win auction, Agent provide a Contract for buyer & saler to sign. I sign the Contract, write deposit cheque & give to Agent. Next day Agent told me my cheque need signature. I see him to sign my cheque. After I sign my cheque, Agent ask me to sign another identical set of Contract of Sale again. I refuse & check the Contract & find out Sale house plan drawing in my signed Contract is not consisting with actual sale house plan. Can I get my deposit back?