He refused to withdraw money when I profited a lot

I met a broker on a platform. The first time I came into contact with foreign exchange, I actually believed him and invested money to speculate in foreign exchange. At the beginning, I withdrew a small amount of money quickly，and I didn't need to wait too long. But until my profit became higher and higher, he had many excuses not to withdraw money to me. Later, he told me that I would have to pledge 1,000 US dollars to withdraw money. . . The handling fee is also deducted for withdrawals. This is really a big liar! ! !