Hi fahed,
the cameras should appear in the waze editor. did you have a look, and make sure the camera layer is on? (Shift S)
If so, can you show a permalink of the segment / area you've reported them?
As Bazgrant said, you have to enable the checkbox in the editor, to get them in the map.

I do find the cameras bit annoying myself, it does seem to take the servers a while to process the fact that a camera has been added in the app and actually show it in the editor.

However, from the wiki it says:

Adding Cameras
Cameras of all types can only be added to the map from the client application. You must be driving past the location of the camera installation (preferably on the correct road and in the correct direction) to issue this report.
Once you have submitted the camera report, it will appear on your client screen (and yours ONLY). Once that day's drives have been processed by the Waze servers, the camera will appear in the Map Editor where it can be approved. It must be approved for other drivers to be alerted of its presence.

It may be worth asking this question in the main waze forums and see what they say?