If you want to stop using Enki with your current WiZ home, go to "Comptes connectés" and select WiZ in the list. Then select "Se déconnecter", and confirm ("se déconnecter").

If you want to fully delete all link and data associated with Enki, this can be done by tapping on the “Unlink” at the bottom of the Enki integration screen in the WiZ app.