Stay away from this thiefs

I'm in chat from December with a girl who say being Li Yanran (Ella for friends) from Hong Kong. After two weeks chatting she suggest me to invest in trading, with risk free because her uncle is a very good analyst, showing me her profits I have been convinced. She instruct me how to Buy Usdt on Huobi and transfer on my broker account BTCUSDT Investment Limited. Firstly I start to invest 5000 euro with high earning in few days. She push me to deposit more money for trade in the big market, otherwise I couldn't trade again. So I deposited 3000 euro more last week. Yesterday i started to have doubt and searching in internet. I found this forum. Therefore I asked to the broker to withdraw my founds, obviously they told me to pay 15% of fees for withdraw. Here is the what they reply: "Dear customers, according to the withdrawal regulations of our platform, in order to prevent MT5 customers from laundering money. You can only transfer all funds. When your account is less than $50,000. You need to pay a 15% handling fee. When your account is higher than $50,000 USD. You need to pay a 10% handling fee. Please pay the handling fee. We will help you withdraw funds after receiving the payment. Thank you for your cooperation. In order to better serve customers. We upgraded WhatsApp customer service. Please add us. The phone number is +44 7909470442. Please add WhatsApp customer service for communication."