Hai Monica,
How is the organisation struture framed in your organisation,are you the only one heading HR deparmtent ,or you also have a Head of Department.
What has been the reaction of all the staff in your organisation,make a survey of all the staff and take their responses make a analysis of Organisation behaviour expected from Management towards staff and Staff towards Management, prepare a Organisation code of conduct get it approved by the Head of HR or the so called Owner of the organisation( It will help him read the code of conduct practices in his Organisation itself).
Make a Huge Sign board( Even a Nice chart presentation would do) with captions on Anger, Good conduct, Having a Right Attitude for conducting good business,building a brand in Market, to be installed at the entrance of your organisation so that who ever( Management,Employees,Vendors, Customers) enters will read and this will help them have a impact on their mind to behave as per norms.
If still it fails..... You walk out as your career should be important for you not the organisation.
Thanks and Regards
Taj Syed