Unable to withdraw (jiashengwealth.com)

This lady named Yara approached me on tinder then told me about crypto on this platform named (OXTRX/USDT). Then she told me to invest 200$ she even provided me 400$ in my trading account ... then keeps telling me about the hefty profits ... now i have reached 50k and cannot withdraw because they want me to pay taxes of 8k USDT.... please can someone help me out .... i deposited 8K USDT ... but now their customer services dont reply.... this is how they take money .... please someone look into this matter ... and if you can then please help us recover our money....