Trade Finance Loan ****med me 13700

I need Help please. I have been ****ed by Trade Finance Loan company. I known about them through the sms they sent. So I emailed them, they sent me the application form and they said I must send it back with 3 months bsnk statement, Id copy, Proof of address and Payslip with I did. Then someone called me and advisede that the Loan has been approved and they have sent me an email. When I checked the email it confirmed that the loan was approved but I neede to make a payment of 4200 for Admin & Lawyers fees, which I did. Then they asked me to pay 6500 for bank charges, I ddnt want to, then the girl who called her self Nomsa called and convinced me that all these payment will be paid back with the loan which the contract was also stating that it will be paid back & ended up paying it. It was Friday the 25.01.2019 then she confirmed that the loan will be on my account saturday morning. Saturday morning I received a massage claiming I should pay 4800 for insurance becouse the Loan is with held by Reserve Bank. I called her and she confirmed its for insurance and I said I really dont have any, she said ok I must just pay 3000 & they will make a plan as a compamy for the loan to be released...then I did..after they still ask for that 1800 to make that 4800, which I said as I advised I dont have..I said ok im cancelling all this and want all the money I paid back which they said they cant give it to me back because the loan is on process and I never paid that 1800. They havent blocked me on Whatsup but still asking me to pay 1800 & see if the Loan wont be in. I need help to get my money back if possible or these people to be cought.