It is impossible to remove TotalVPN.
The Windows service (named OVPNService) and related driver remain there after uninstall.
Setup files remain there after uninstall.
The Windows network connection and its tray icon remain there.
Their chat agents are totally clueless about this. They suggest to remove manually the app in the Program folder, but the app does not install there.
… and did I mention that all the free servers (just 2) did not work?