The TeamWox system has a feature of protection of contacts from deletion. When deleting, contacts are preliminary moved to the special filter "Deleted".
If you need to completely remove a contact from the system, press the button that appears if you point the mouse cursor over it. To completely remove all the contacts, you should press the "Delete all" button located in the upper part of the tab.
To restore a contact, press the button that appears when putting the mouse cursor over it.