I make an offer to buy a house with 10,000 deposit ,but now the banks didn't qualify for me ,can I get back my deposit or no

First thing I offer deposit to buy a house with 1000 deposit to the agency,then I said when the bank approved for me the financial then I will down the rest deposit is $9000 ,then couple day the agency call me bank was approved for me and tell me deposit the rest ,because the bank broker is the agency introduce to me ,but late I go ask the mortgage broker to make sure everything ,then it know I didn't get qualify for finance ,then I talk to the agency to get my deposit back ,because I am not qualify to buy house and he was liar to me ,then he said I need looking for a cosigner if no I will lose my deposit ,but I can't find any one cosign for me ,I was so stress and how can I get back my deposit ,$10,000 is a lot of money I can't lost ,this agency he is liar ,can someone help me plz