Unable to withdraw and a trading scam

i opened a foreign exchange account with Anand Koundal which was the previous name of Sushi Global Investing i deposited 250000 usd and traded foreign exchange market and made 8,623,372 usd . The problem started when I wanted to withdraw funds where they started asking me to deposit 200,000 usd . I said whatever the fees is deduct it from my gains and withdraw me the money . They said they cannot unfreeze my account unless i deposited 200,000 usd. Later they closed Anand Koundal Limited and said they upgraded my account and the new name is SUSHI Global investing limited.
This needs to be raised with the authorities and regulators as several people are being scammed by these people on a daily basis . How