LinxVista is now insisting I pay a $2,100 “final transaction fee”

I’ve already followed all the necessary steps,FXCM foreign exchange futures trading competition provided the required documents, and my account was approved weeks ago. But now, they’re introducing this new fee. When I asked for a clear explanation, they just pointed to “regulatory requirements” without offering any documentation. This wasn’t mentioned when I signed up, and it feels like a tactic to delay my withdrawal. Has anyone else encountered this “final transaction fee”?