Talk to Psychiatry on Schizophrenia/Psychosis

My sister is suffering from schizophrenia since 2011 and we have treated / consulted many doctors but for a time being she recovered later on adopt same conditions like not to involve in any activity, lying on bed but not sleep, not eat herself, routine usual activities required for normal life are disappeared from his life, always says she is hearing voices and seeing some images and someone is trying to avoid me not to work and not to involve in social routine normal life. especially she cray alot daily in bad manner and demand death. Sir, we are much depressed from her condition even though my mother is also affected by her acts and she is also now a psycho patient. You are humble requested to please guide us or recommend us for her proper treatment that leads to permanent recovery otherwise my mother and others people will be badly affected by her acts.