Clear my account maliciously

There should be 8400USD in my account. After I received 1200USD, the review failed.
Until my exposure, they suddenly lifted my blockade and contacted me with the issue of gold withdrawal.
I received a withdrawal of 1200USD on the same day, and the remaining 7200USD in my account was emptied by them on the night I received the withdrawal. I did not withdraw it at all. As shown in the figure, my last withdrawal review was 1200USD and then my account The turnover was deducted by them using a system to withdraw 7200USD. If it was my own withdrawal, it should be transferred to my account by local bank transfer.
But I did not send out the money for review at all, nor did I receive the money at all