Unfortunately, there are no simple ways to initiate CSR changes within a company. CSR means corporate social responsibility and has to do with the ethics the company follows and what policies are implemented to improve the CSR for the future. Often times this means a complete rebuilding of the company.
In order to take a company who is seen as corrupt, unfair or damaging to the environment, it takes a lot of work to change both the activities of the company and to change the image of the company in the eyes of the consumers.
A great first step is to hire someone with experience in CSR, business ethics or the environmental impact of large businesses. This will allow you to focus more on implementing the policies and ensuring that they are being followed by employees while the CSR professional focuses on improving the ethical base of the company itself.