The person disappeared, unable to handle the withdrawal

The person came to chat with me on ig, and then it became more and more familiar. That's how I realized it. He said that he felt that I worked very hard and did not earn a lot of money, so he told me to invest in gold. In the beginning, it was small amount of money. Later, he asked me to buy more, so that the profit will be more. So I invested more money. In addition, he has put his money into my MT5, so I won’t doubt it. He taught me to buy USTD from merchants on Binance, and then contact customer service to deposit funds to MT5 before making transactions. Withdrawal is made in the same way. In the first few times, I did get money sometimes, but later I thought I would make more money in the next transaction if I kept the funds. I have accumulated a certain amount of funds so far, so I want to withdraw them. As a result, the customer service could not be contacted, and the loss was about 80, which was only the principal.