We are sorry for hearing the negative feedback from you. I have found and forwarded your ticket within TeamViewer system, one of the represetitive from TeamViewer Support Team will be contacting you shortly.
Alternatively, you may check out the TeamViewer ID which is using TeamViewer channel via TeamViewer -> Help -> About TeamViewer -> Channel use. And then search the ID within your Computers and Contacts list then to communicate within your team for disconnection please.
If you are interested in purchasing additional channels for concurrent connections, feel free to contact TeamViewer Sales Team for further discussion.