Pine Valley Financial review: Please, help me to return money 2

I received email from the company Pine Valley Financial, a man told me that I could receive a loan in amount of $5, 000. I needed a cosigner or to make 4 payments in amount of $600. I decided to send them payments. After I sent the first payment, I received a phone call from this company. And a man told me that they considered my case and I needed to pay the fifth payment. I refused and told to return money, but he hung up on me. Please, help me to return money.