If you’d like to disable notifications on your device, please follow these steps:
- Locate your device settings
- Select “Notifications”
- Select the game from your Application list > Configure notifications
And also you can disable in-game alerts,
- Go to [Settings] on the top left corner of the main screen
- Click [Sounds/Alerts]
- Turn off [Notifications], [Event Alerts], [Late Night Alerts] which you'd prefer