Looking for immediate Kijiji notifications as things are posted

On a Samsung Galaxy S7, Notifications should be the third from top in the main Settings menu. That's where it is on my S7. And if you open that you should see a list of your installed apps, where they can be toggled ON or OFF for each app.

 

Tap the little gear in your settings screen, you will need to swipe down twice to see the little gear.... Then choose apps and notifications, then find your Kijiji app for notifications... See screenshots.

 

You stated "S7" in your OP, now is that a Samsung Galaxy S7 or Galaxy S7 Edge or something else? One thing your "S7" phone doesn't have SAMSUNG at the top, which these phones should have AFAIK. Also the Settings menu on your phone quite frankly looks quite sparse.

On my S7 with Android 8, in the Settings menu I have:
Connections
Sound and vibration
Notifications
Display
Wallpapers and themes
Advanced features
Device maintenance
Apps
Lock screen and security
Cloud and accounts
Google
Accessibility
General management
Software update
User manual
About phone
Developer options


For reference this is a Samsung Galaxy S7 Edge.
Note SAMSUNG at the top.

 

I'm still trying to work out what exactly you've got there, and from what I've seen so far. It could be a fake Samsung S7? Like the fact it doesn't have SAMSUNG at the top, and the Settings menu has abnormally few items on it. Where did you buy this phone?


This shows the main problem I'm having with your S7 Edge. And now why I think it could be a counterfeit, and isn't what it seems.

What I know as an S7 Edge. "SAMSUNG"

Your phone. No "SAMSUNG"
The positioning of the camera and sensors is different as well. Also the clock on yours is on the left, it should be on the right on this phone(when running stock Samsung firmware).

EDIT: Your phone actually looks more like a Galaxy S8 Edge. Although that still doesn't account for so few menu items in the Settings.