I can't withdraw money no matter how long it takes

We started communicating through the LINE group, and talked about the economic situation every day. Before long, the topic of FX trading came up, and the instructor was the speaker. And he started to give instructions on positions and the number of lots. Everyone was making a profit from it. I, who was watching it, started depositing and participating in trading. Before I knew it, I had invested a large amount of money. I wanted to withdraw my profits. So when I applied for a withdrawal, I was contacted by a broker (Yoshiki Asai) saying that I should think a little more because taxes would be charged. He told me to wait because the exchange tax will be paid next month. So I postponed for this reason. After all, it is a state where exchanges put in without being withdrawn even once. Also, I was added to a similar LINE group, and the exchange of people with different names but the same content as another group continues. please be careful.