Unable to withdraw

I was scammed by one Chinese girl , her name Is QIU, initially she chatted with me and sent messages to wrong person. Later she continues talked nice and to invest in Soon trade5 app. I invested 20000$, initially I withdraw 100 and later when I withdraw 10000$, they asked to pay platforms tax 12.5%. After paid 10000$ tax also unable to withdraw the money. I found this is scams and trapped me in this app. Please do not invest