Uable to withdraw all funds

I have deposited $450000 into my account with KuFin starting from November 25th 2021 till December 11th 2021. I have got bonus $150000 total and earned profit $547000. I was denied to make any withdrawals on December 17 2021. Miss Han broker +44 7858 972298 with KuFin informed me that I can’t make any withdrawals because security department detected ubnormal situation in my account. She informed me that I need to deposit whole balance of $1144852.97 first for verification.