Unpaid profit

This company doesn't want to release my profit of R1500 which I traded with. Instead they are telling me that my profit went up and I must deposit R6000 for them to release that high profit. And that's not what we agreed on. All I want is for them to release that profit of R1500 because I keep on telling them that they must release that amount because I don't have money that's why I traded with what I have.