If you are not being credited with 5 Premium Points per day even though you are a subscriber, it is possible your subscription is not active and you need to manually restore it to reactivate it.

Try accessing your Settings tab in-game and tap on the Restore Purchases button.
It should reactivate your subscription if you usually play with multiple accounts.

If your subscription was successfully restored, you will be able to see a pop-up crediting you the remaining 4 VIP points you previously missed.