This resource explains how to make a misconduct complaint and it mentions the types of misconduct.
“Important note before sending your complaint: the Investigation Service of the IGO does not have the authority to deal with protection/assistance related requests. This means that the IGO cannot review individual refugee claims, cannot provide individuals with assistance in kind or in cash, and cannot provide applicants with a durable solution. For these matters, please contact the UNHCR Office where you are registered or closest to where you are located.”