Did you watch the video on conflict resolution within a free society? I think it covers many of your questions. If businesses don't provide good service or act in ways that are not in the best interests of their communities, they will no longer gain business. People will use competitors. That's what separates a business from a government in that a government has a monopoly on services and it supports that monopoly with the threat of violent force. Businesses have to earn trust voluntarily. Now, often, we see governments creating non-natural monopolies for certain corporate business interests at the expense of individuals, but that's not really a fault of business as much as it's a fault of the system made available to them through lobbies and regulations. For more on that see regulatory capture and revolving door politics.

Your questions display a desire to have an ultimate authority. I don't mean to offend you, but this is the same thinking children have when they need their mom or dad to define reality for them and set the rules. Adults figure things out via consensus. Laws are in many ways emergent properties of rational consensus on morality and human wellbeing. At least, from a common law perspective, that's what they are supposed to be. When we start thinking in terms of authoritarianism where some person gets to decide, we run into real problems. Instead, we should be relying on principles based in reason, logic, and evidence. Ideas which are morally sound and supported by the communities in which they are used.