How Can Depression And PTSD Be Treated?

My adopted son is 16 he has been diagnosed with bipolar depression, PTSD, conduct disorder, parent relational disorder focus on mother, personality disorder traits, anorexia. He was recently diagnosed with ues so he doesn t have to deal with drama he suffered as a child from his birth mother in form of is abilities from his mother and sexual abuse from her appointment. They removed him from all medications except for Serequel.The psychiatrist has yet to Call me he s been in there two weeks. I finally got a meeting at the hospital with his team and the hospital psychologist and psychiatrist Who is treating him at the hospital. When he was using hydroxyzine to three times daily and Serequel three times daily he was doing much better than he is now. He s rapidly losing weight at the hospital partially do probably to be added Synthroid and the addition of chlorazepam. They also added Zoloft which I m very unhappy about due to the fact that he s only 16 and I do not feel it safe for teenagers. They give him 800 mg of Serequel at bedtime and have totally discontinued the hydroxyzine, using chlorazepan PRN instead. I am very unhappy with his course of treatment at this hospital. They have yet to call me after leaving several messages several visits to the hospital they were too busy to talk. At the meeting they simply recommend a residential treatment and within five minutes of meeting is over. I m very concerned that he is not being properly treated. They have yet to call his psychiatrist he s been treating him for years. He has called them several times and has not gotten a call back. What do I do I feel lost in the system