UI Object is there but can't destroy it.

I am implementing UnityAds in my game and have some UI I want to show and hide, for that I am Instantiating objects(using the InstantiateUI function) and then Destroying them.

All the UI I use is in a simple class:

[System.Serializable] public class ads{

     public Text AdTxt;
     public Button WatchAd;
     public Button Skip;
     public Text tyTxt;
             [HideInInspector]
     public GameObject _tyAd;
     [HideInInspector]
     public GameObject _AdTxt;
     [HideInInspector]
     public GameObject _SkipAd;
     [HideInInspector]
     public GameObject _WatchAd;
         
 }

Note: the underscored GO are defined null and will later get assigned as the clones of the not underscored objects.

tyAd is called after the Ad is Shown,it deletes some UI I don't want anymore and creates a Text thanking the player for watching an ad.

public void tyAd(){

 Destroy(Ads._AdTxt.gameObject);
 Destroy(Ads._WatchAd.gameObject);
 Destroy(Ads._SkipAd.gameObject);
 Ads._tyAd = InstantiateUI(Ads.tyTxt.gameObject);
     

} Note: The Ads.tyTxt is a GO with a Text and a Button Component.

AdResume gets called after the player Clicks the Button:

public void AdResume(){

 Time.timeScale=1;
 print (Ads._tyAd.name);
 Destroy(Ads._tyAd.gameObject);

}

Here is the problem: The Ads._tyAd.gameobject doesn't get destroyed and stays in the scene.

If you think this may have something to do with it, here is the InstantiateUI function:

GameObject InstantiateUI(GameObject UI){

     GameObject clone=Instantiate(UI)as GameObject;
     clone.transform.SetParent(GameObject.Find("Canvas").transform,false);
     return clone;
 }