TRADE FINANCE

Hey I made a loan at trade finance and hey asked me to pay a fee of R2000.00 so i did. Then they asked me to pay a transaction fee of R2300 so i did. They told me to pay R1860 for my cheque to be cleared and to be paid in my account so i did. I havent received anything. They asked me to pay 1200 again. I never did. they took R6160 from me. WHAT CAN I DO