If the item is turned on and you have logged in with the correct account, you can try toggle "Contact" off and then on again.
If you are trying to find solution to recover lost contacts or messages after updating to i OS 10, follow below recommended free methods to do it now.
If you want to manage your i Cloud contacts, you can consider the wonderful i OS contents management tool – Any Trans, which also does great in managing i Cloud data.
With it, you can delete multiple or all contacts from i Cloud at once, and also can export them to computer with CSV or VCF format, and even can transfer contacts from one i Cloud account to another account. You can try to restart your i Phone by turning off and on your device. If you’re used to backing up i Phone with i Tunes, there is much chance that you’ll get back lost contacts by simply restoring from backup.
Lost important contacts or messages after updating your i OS device into i OS 10? Free methods can help you free restore lost contacts or messages after i OS 10 update from your i OS device now. It’s no longer strange for i OS device users to lose contacts or messages anymore every time when they update to new i OS system in their i Devices.
Similar problem may happen to your again when you update to i OS 10.