If your notifications are delayed, you may want to resend your service books.
You can change your sound and vibration alert settings for WhatsApp, but the steps are different depending on what software (OS) version of BlackBerry you have.
To customize WhatsApp alerts, go into WhatsApp Settings and select System Profiles. In System Profiles, choose the sound and vibration settings you want.
To customize WhatsApp alerts, go into WhatsApp Settings and select System Profiles, then follow these steps:
In System Profiles, select Edit profiles at the bottom to be presented with the list of your profiles.
Next, press the button and select Edit and then select Other to get into edit mode of the profile you would like to change.
Then, scroll down to the very bottom and select the WhatsApp Message notification entry. You can now edit how you would like to be notified when you receive a new message.
Remember to save these new settings when you exit.
If your notifications are not showing up in your notification bar it is probably because you have too many apps with notifications installed. Try uninstalling some other apps and that might fix the issue.