Loading and Saving High Score

I have been working on this for hours, watched numerous tutorials, and searched unity answers, but cannot figure out what I'm doing wrong. I want to save my highscore using player prefs, but when I refresh the game the high score is back to 0. I am using two scripts:

Code#1:

 using UnityEngine;
 using System.Collections;
 using UnityEngine .UI;
 using UnityEngine .SceneManagement ;
 
 public class GAMEOVERManager : MonoBehaviour {
 
     public Text highScoreText;
     public Text scoreText;
     public Text goldTeethText;
 
     // Use this for initialization
     void Start () {
 
         highScoreText.text = PlayerPrefs.GetInt ("High Score").ToString ();
         scoreText.text =PlayerPrefs.GetInt ("Score").ToString() ;
         goldTeethText.text = PlayerPrefs.GetFloat ("Tooth Score").ToString ();
         PlayerPrefs.Save ();
 
     }
     
     // Update is called once per frame
     void Update () {
     
 
     }
 
     public void RestartGame(){
         SceneManager.LoadScene ("Gameplay");
     }
 
 
 }

Code#2:

 using UnityEngine;
 using System.Collections;
 using UnityEngine .UI;
 using UnityEngine .SceneManagement ;
 
 public class ScoreManager : MonoBehaviour {
 
     public static int highScoreCount;
 
     public static int scoreCount;
 
     public static int TKOCount;
 
     public static float toothCount;
 
     public Text TKOText;
 
     public Text scoreText;
 
 
     // Use this for initialization
     void Start () {
 
         PlayerPrefs.GetInt ("High Score");
 
         IntializeVariables ();
 
         TKOCount = 0;
         scoreCount = 0;
 
     }
     
     // Update is called once per frame
     void Update () {
 
 
 
         if (scoreCount <= 0) {
             scoreCount = 0;
         }
             
 
         if (scoreCount > highScoreCount) {
             highScoreCount  = scoreCount;    
             SaveHighScore ();
         }
 
         scoreText.text = " " + scoreCount;
         TKOText.text = " " + TKOCount;
         toothCount = scoreCount * .10f;
 
         SaveScore ();
         SaveGoldTeeth ();
 
 
 
 
 }
     void SaveTeeth(float teeth){
 
     }
 
     void SaveHighScore(){
         
         PlayerPrefs.SetInt ("High Score", highScoreCount);
         PlayerPrefs.Save ();
     }
 
     void SaveScore(){
         
         PlayerPrefs.SetInt ("Score", scoreCount);
 
     }
 
     void SaveGoldTeeth(){
         PlayerPrefs.SetFloat ("Tooth Score", toothCount);
         PlayerPrefs.Save ();
     }
 
     void IntializeVariables(){
         if (!PlayerPrefs.HasKey ("Game Initialized")) {
 
             PlayerPrefs.SetInt ("Score", 0);
             PlayerPrefs.SetInt ("High Score", 0);
             PlayerPrefs.SetFloat ("Tooth Score", 0);
 
             PlayerPrefs.SetInt ("Game Initialized", 123);
 
         }
     }
 
 }

Any help is appreciated!