Admobs ads stopped showing up in the build?

I published an app the ads were working then I upgraded Unity to 5.5.1 and messed around with something in the admob plugin now they are being called I can see that in the unity editor but the banner ads wont show up in the android app.

using System.Collections; using System.Collections.Generic; using GoogleMobileAds; using System; using GoogleMobileAds.Api; using UnityEngine;

public class AdmoHjskad : MonoBehaviour {

 BannerView banner;
 InterstitialAd fullAdMob;
 void Start()
 {
     RequestBanner();
     
 }
 public GameManager gameM;
 public float timer;
 void Update()
 {
     timer += Time.deltaTime;
     
     if (timer > 45)
     {
         RequestBanner();
         
         timer = 0;
         
     }
     if(gameM.Tries > 2)
     {
         RequestFull();
         if (gameM.Off == true)
         {
            
             ShowFullAds();
             gameM.Tries = 0; 
         }
     }
 }
 void RequestBanner()
 {

     string bannerId = "I would love for you to help me make money but its probably a bad idea";
     banner = new BannerView(bannerId, AdSize.SmartBanner, AdPosition.Top);
     AdRequest adRequest = new AdRequest.Builder().Build();
     // Create a 320x50 banner at the top of the screen.


     // Register for ad events.
     this.banner.OnAdLoaded += this.HandleAdLoaded;
     this.banner.OnAdFailedToLoad += this.HandleAdFailedToLoad;
     this.banner.OnAdOpening += this.HandleAdOpened;
     this.banner.OnAdClosed += this.HandleAdClosed;
     this.banner.OnAdLeavingApplication += this.HandleAdLeftApplication;

     // Load a banner ad.
     this.banner.LoadAd(adRequest);
     this.banner.Show();

 }
 public void ShowBanner()
 {
     
     banner.Show();
     

 }
 void RequestFull()
 {
     string idFull = "Blahhhhh";
     fullAdMob = new InterstitialAd(idFull);
     AdRequest adRequest = new AdRequest.Builder().Build();
     fullAdMob.LoadAd(adRequest);
 }
 public void ShowFullAds()
 {
     if (fullAdMob.IsLoaded())
     {
         fullAdMob.Show();
         RequestFull();
     }
     else
     {
         RequestFull();
     }
 }

 #region Banner callback handlers

 public void HandleAdLoaded(object sender, EventArgs args)
 {
     MonoBehaviour.print("HandleAdLoaded event received");
 }

 public void HandleAdFailedToLoad(object sender, AdFailedToLoadEventArgs args)
 {
     MonoBehaviour.print("HandleFailedToReceiveAd event received with message: " + args.Message);
 }

 public void HandleAdOpened(object sender, EventArgs args)
 {
     MonoBehaviour.print("HandleAdOpened event received");
 }

 public void HandleAdClosed(object sender, EventArgs args)
 {
     MonoBehaviour.print("HandleAdClosed event received");
 }

 public void HandleAdLeftApplication(object sender, EventArgs args)
 {
     MonoBehaviour.print("HandleAdLeftApplication event received");
 }

 #endregion

}