How to show Ads after every time player lose

Hello ;

I am new to unity ; i just want to test something on a code source so i hired a freelancer to implement ads The ads are showing after 3 times player lose and in the pause menu , i want to show it every time the player loses , can you please show me how to do it and be specific since i am new to all this

here is my ads control

 using UnityEngine;
 using System.Collections.Generic;
 using System.Collections;
 using System;
 using UnityEngine.SocialPlatforms;
 using GoogleMobileAds.Api;
 
 public class AdsControl : MonoBehaviour
 {
     
     
     protected AdsControl ()
     {
     }
 
     private static AdsControl _instance;
 
     InterstitialAd interstitial;
 
     public string AdmobID_Android,AdmobID_IOS;
 
     public static AdsControl Instance { get { return _instance; } }
 
     void Awake ()
     {
         
         if (FindObjectsOfType (typeof(AdsControl)).Length > 1) {
             Destroy (gameObject);
             return;
         }
         
         _instance = this;
         MakeNewInterstial ();
 
         
         DontDestroyOnLoad (gameObject); //Already done by CBManager
 
 
     }
 
 
     public void HandleInterstialAdClosed (object sender, EventArgs args)
     {
 
 
         if (interstitial != null)
             interstitial.Destroy ();
         MakeNewInterstial ();
     
         
     }
 
     void MakeNewInterstial ()
     {
 
 #if UNITY_ANDROID
         interstitial = new InterstitialAd (AdmobID_Android);
 #endif
 #if UNITY_IPHONE
         interstitial = new InterstitialAd (AdmobID_IOS);
 #endif
         interstitial.OnAdClosed += HandleInterstialAdClosed;
         AdRequest request = new AdRequest.Builder ().Build ();
         interstitial.LoadAd (request);
 
     }
 
 
     public void showAds ()
     {
         
         interstitial.Show ();
     
 
     }
 
 
     public bool GetRewardAvailable ()
     {
         bool avaiable = false;
 
         return avaiable;
     }
 
 
 
     public void HideBannerAds ()
     {
     }
 
     public void ShowBannerAds ()
     {
     }
 }
 
 

i would really appreciate your help

best regrads