illegitimate platform, scammer, defraud me of CNY 310,000, unable to withdraw

I just started to invest 50,000RMB in Forex market, and was induced to deposit more by all kinds of special offers. At last, they asked me to pay taxes of 150,000 to withdraw my money, and after my payment, they said the my bank number was incorrect and asked me to pay 20% guarantee. And in the end I lost 310,000RMB of my money.