Unity Ads stay at testMode

I have a game I did not publish it yet because I want the ads to work first. The problem is that even if I set testMode to false in the Code and in the Services tab it still shows test ads or no ad at all i tried it on 2 phones one android one iOS.
I want the ad to show up every time you click play in the Start menu
I created a empty object with the script.
here's the code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Advertisements;
5. using UnityEngine.SceneManagement;
6.  
7. public class Ads : MonoBehaviour
8. {
9.     string gameId = "4078981";
10.     bool testMode = true;
11.  
12.     void Start()
13.     {
14.         Advertisement.Initialize(gameId, testMode);
15.     }
16.  
17.     public void VideoAd ()
18.     {
19.         Advertisement.Show();
20.         SceneManager.LoadScene(1);
21.     }
22. }
23.  

 

Thanks for the reply. How do i check if the sdk is ready or not and how do i get a device log
Thanks in advance