How to destroy BANNER-ADs on scene change in unity

Hey guys I integrated Startapp (that provides ads) in my unity game , when I switched the platform to iOs and deployed the game in my iphone (via XCODE) , the Banner-Ads are not getting destroyed on scene change i.e. I want my Banner_ad in only Scene 1 , but the Banner_Add doesn't hide or destroy when I switch to another Scene 2.
So I want to stop Banner_Ads from being created when I switch to next Scene.
Below is the BANNER-ADS code , any suggestion is appreciated.
Thanks !!

Code (CSharp):

1. #if UNITY_IOS
2.  
3. using UnityEngine;
4. using System.Runtime.InteropServices;
5. using System;
6.  
7. namespace StartApp
8. {
9.     public class BannerAdiOS : BannerAd, IDisposable
10.     {
11.         bool mDisposed;
12.         readonly GameObject mGameObject = new GameObject();
13.  
14.         static BannerAdiOS()
15.         {
16.             AdSdkiOS.ImplInstance.Setup();
17.         }
18.  
19.         public BannerAdiOS()
20.         {
21.             mGameObject.name = mGameObject.GetInstanceID().ToString();
22.             mGameObject.AddComponent<ListenerComponent>().Parent = this;
23.            
24.         }
25.  
26.         public void Dispose()
27.         {
28.             Dispose(true);
29.             GC.SuppressFinalize(this);
30.         }
31.  
32.         protected virtual void Dispose(bool disposing)
33.         {
34.             if (mDisposed)
35.                 return;
36.  
37.             if (disposing)
38.             {
39.                 // Free any other managed objects here.
40.             }
41.             sta_removeBannerObject(mGameObject.name);
42.             mDisposed = true;
43.         }
44.  
45.         ~BannerAdiOS()
46.         {
47.             Dispose(false);
48.         }
49.  
50.         public override void PreLoad()
51.         {
52.             sta_preloadBanner(mGameObject.name);
53.         }
54.  
55.         public override void ShowInPosition(BannerPosition position, string tag)
56.         {
57.             if (tag == null)
58.             {
59.                 sta_addBanner(mGameObject.name, (int)position);
60.                 return;
61.             }
62.             sta_addBannerWithTag(mGameObject.name, (int)position, tag);
63.         }
64.  
65.         public override void Hide()
66.         {
67.             sta_hideBanner(mGameObject.name);
68.         }
69.  
70.         public override bool IsShownInPosition(BannerPosition position)
71.         {
72.             return sta_isShownInPosition(mGameObject.name, (int)position);
73.         }
74.  
75.         class ListenerComponent : MonoBehaviour
76.         {
77.             public BannerAdiOS Parent { get; set; }
78.  
79.             void OnDidShowBanner()
80.             {
81.                 Parent.OnRaiseBannerShown();
82.             }
83.  
84.             void OnFailedLoadBanner(string error)
85.             {
86.                 Parent.OnRaiseBannerLoadingFailed(error);
87.             }
88.  
89.             void OnDidClickBanner()
90.             {
91.                 Parent.OnRaiseBannerClicked();
92.             }
93.         }
94.  
95.         [DllImport("__Internal")]
96.         static extern void sta_addBanner(string gameObjectName, int position);
97.  
98.         [DllImport("__Internal")]
99.         static extern void sta_addBannerWithTag(string gameObjectName, int position, string tag);
100.  
101.         [DllImport("__Internal")]
102.         static extern void sta_preloadBanner(string gameObjectName);
103.  
104.         [DllImport("__Internal")]
105.         static extern void sta_hideBanner(string gameObjectName);
106.  
107.         [DllImport("__Internal")]
108.         static extern bool sta_isShownInPosition(string gameObjectName, int position);
109.  
110.         [DllImport("__Internal")]
111.         static extern void sta_removeBannerObject(string gameObjectName);
112.  
113.  
114.     }
115. }
116.  
117. #endif