Can't withdraw before deposit money

My name is Conrad Lodewyk, I've been introduced by Zesipho Samkelo to trade with returnforex.1 with the minimum amount of R1 500. The expert so called, chat with me to put more R1 500, which I did. within 5 days the profit was $15000. Then was advised to withdraw, but first to deposit the amount of R8 400. I did deposit but then I received money notification but the money wasn't in the bank account. They asked me to deposit R22 000 for authorization, R5 000 for identification. now they need R25K