Follow these steps to resolve the issue:
1. Ensure that your phone is connected to the internet, and you're able to receive messages.
2. Check your phone's settings:
- For Android: Go to your phone's Settings > Apps & notifications > וואצאפ > App notifications.
- For iPhone: Go to your phone's Settings > וואצאפ > Notifications.
3. Check וואצאפ settings: Open וואצאפ, go to Menu Button > Settings > Notifications. Here you can reset your notification settings to the default.
4. Update the app: Make sure you're using the latest version of וואצאפ. Visit your phone's app store to check for updates.
5. Restart your phone: Sometimes, the solution might be as simple as restarting your phone.
If you've tried these steps and still are not receiving notifications, you may need to reinstall the app. Remember to back up your chats before doing so.