This is a fraud platform. Can't withdraw

I knew a customer manager this September. She pushed me to opene an account. I opened an account on October 10. I deposited 30,000 on the same day and lost, just over 200 left. I deposited another 50,000 on the morning of October 11. A staff helped me to operate and there was ober 800,000 in the afternoon. But I can't withdraw. The customer service said I have to pay personal income tax. I transferred three times to three designation accounts, 70,812 in total. I was asked to pay over 70,000 as certification fund. Now I called the police for it's a fraud platform.