Singh Investment Properties

I applied for this property and paid $100 application fee. The next morning, the owner called me and said that I needed to drop off a $500 deposit and that my application could not be processed without it. I told him I did not know him and was not comfortable. So I told him nevermind and asked for my application fee back. He will not return my calls or messages and he kept my money.
Product_Or_Service: Application fee for a home