To delete a Sub Company, you need to log into your Company at https://apps.risevision.com, and then click on your Company name in the top right. From there, go to Select Sub Company, and then select the Sub Company you want to delete.
Now, across the top, you will see a red banner that says you are in that Sub Company. From here, click on the Company name in the top right, and select Company Settings.
Now, you can see the option to Delete the Company down at the bottom of the Company Settings window. Select that, type in Delete, and that Company is deleted!