Have to pay money to withdraw

On June 25th of this year, I met a person on IG, he said he was engaged in financial analysis, because I was very interested in investment, so I asked him to teach me something about investment, he taught me to buy XAU/USD with TEDA, and invested money to buy XAU/USD on the Unisnowfx platform, and it was normal for me to receive a small amount at the beginning, but when I wanted to receive a sum of 40,000 US dollars, it was impossible for me to withdraw the gold for some reasons, and then I had to pay another 30,000 US dollars to do it. I was asked to pay another 30,000 dollars to withdraw the gold, and this has been going on for a long time, and there is no explanation for it yet.