Unilateral decision making by PSG CFD broker

I trade CFDs at PSG with my broker of more than 20 years. Last week the CFD trading desk at PSG securities cashed out my position without any notification and consultation with me or the broker. The trading desk sends *** to my broker and confirm that the *** did not go through. They send margin call notifications to their admin office and not one contacts the client. I feel that this cfd trading desk operate completely unilaterally and their responses are arrogant and unreasonable because they dont even bother to inform a client before closing a position. I have submitted a formal complaint to their complaint/compliance team and all they do is respond by saying they did not receive a response from the client. This is completely unacceptatle.