There is hereby established the office of the long-term care ombudsman to be administratively attached to the department of health and human services under N.H. Rev. Stat. § 21-G:10 or administered through contract with an independent non-profit agency under the oversight of the department of health and human services. The office shall be responsible for receiving, identifying, investigating, and resolving complaints or problems made by, or on behalf of, elderly residents of facilities that relate to the health, safety, welfare, and rights of residents. The office shall investigate the administrative acts and omissions of any facility or government agency, as defined in N.H. Rev. Stat. § 161-F:11, V and VI and shall represent the interests of residents in the development and implementation of public policy, rules, and laws affecting residents of long-term care facilities.