We are the service platform that has people, companies and organisations as our users. People use our service as a platform to connect with organisations and companies. Some companies and organisations want to support users by themselves. This could be done by granting agent access to tawk.to as a department, but this will mess organisations with companies and it will be confusing for users. So basically we require 2 levels of department:
Organisation support (opens the list of organisation with a quick search) with subdepartments as organisations
Company support (also opens a list with quick search) with subdepartments as company
This hierarchy structure could be applied to different business scenarios and not limited with the case described above.