Unable to withdraw

I met a friend on Facebook and he invited me to trade MT4. So I try to play at first and trade in small amount and trade around once a week. It is enough to get profits in each trading round, you have to add money all the time. There are 2 times that there is not enough money. The friend helps me transfer to deposit. After trading at the end of the round, there was a total profit of 28,342.24us, so I made a withdrawal, but they say that we laundered money and had to pay a fine of 15% of the total 28,342.24 which is 4,251us. After paying in full with 2 installments, he informs that the account has returned to normal and can be withdrawn. After withdrawing the money, this time I have to pay another 20% (He took a profit trade plus a 15% fine) of 32,593.24us. He assumed that this portion of the profit was abnormal again. I'm completely confused, I did everything he said and then I still have a problem with withdrawing money like this. Was it cheated or not? Explain how I didn't listen to pay a fine of 20% only. I don't know how to get funds. Would you like to help me settle it?