The statutory manager was probably appointed because your OC was not functioning properly. Functioning properly being the key words. But correct me if I am wrong.
The statutory manager is now not responsible to the OC, but to the court that appointed him.
Unless you can prove that his actions are fraudulent or favouring his interests, then you have little recourse.
Why not work towards harmonising your OC with the intent to prove to the court that you can indeed manage yourselves and eventually getting rid of the statutory manager.Only then will you have the control you desire