To deactivate your account, you should remove all personal details and make yourself unsearchable:
Sign in to your ooVoo account on your mobile device.
Tap on your Display Name and type “closed.”
Tap on your profile photo and then tap Settings.
Tap Privacy & Security. Change your search preferences to No one.
Tap on your Profile photo again and remove your photo
iOS users go to your device Settings, scroll to ooVoo and be sure ooVoo Notifications are OFF