Why am I not receiving notifications?
Check the following points:
* Make sure notifications are On. Tap in your smartphone settings button and make sure the “Background notifications” switch is on.
* Don’t force the app to close by swiping up on the app when the multitasking view is open. If you do this you will not let the app run in the background until you manually open the app again (see image).
* You can personalize which notifications you want to receive. Go to Options and then Notification settings to check you haven't deactivated those specific notifications.