If none of your Free contacts appear as Free in contacts list or you'd like to turn Off the option in order not to show Free contacts, there is way to do it directly from application settings. Please follow the steps:
1. Login to your Voxofon account on your device
2. Navigate to Account tab
3. Navigate to "Contacts" section and tap on it
4. Observe there is "Check Contacts" option which you can toggle to turn On and Off. Set to corresponding option whether you'd like see your free contacts in the list or not.