show correct amount of score text after inapp purchase

Unity Engine
1

after collidning player with coin, score increases one unit. also when i touch a ui button it connects to online market and 2000 coins is transfered and bought successfully but the problem is that UI Text does not updates.
here are codes i use :

public class Playerscore : MonoBehaviour {
  
    private int score;
    public Text coinText;

    void Start()
    {
        score = GlobalValues.money;

        coinText.text = "" + score.ToString();
    }

    void OnTriggerEnter2D(Collider2D col)
    {
        if (col.gameObject.tag == "Coin")
        {  
            GlobalValues.money = GlobalValues.money + 1;
            GetComponent<persistentData>().Save();
            score++;
            coinText.text = "" + score.ToString();
            col.gameObject.SetActive (false);

        }
    }

}

public static class GlobalValues
{
    public static int money = PlayerPrefs.GetInt ("score");

public class gameHandler : MonoBehaviour
{
  
    private StoreEventHandler handler;
    public Text GoldText;
    private int gold;

    void Start ()
    {
        gold = GlobalValues.money;

        GoldText.text = "" + gold.ToString();

public void buyGold_2000(ShopItem item)
    {
        Debug.Log ("2000clicked");

        StoreHandler .Instance .Purchase (item );
    }


    public void newGold2000(int Newgold2000)
    {
        gold = GlobalValues.money + Newgold2000 ;
        GoldText.text = "" + gold.ToString();
    }

public class StoreEventHandler : MonoBehaviour ,IStoreEventHandler
{
    private gameHandler handler;

    #region IStoreEventHandler implementation
    void Start()
    {
        handler =gameObject .GetComponent <gameHandler >();
    }

    public void ProcessPurchase (ShopItem item)
    {

        if(item .SKU =="gold2000")
        {
            StoreHandler .Instance .Consume (item );
            StartCoroutine (wait ());
        }

public void OnConsumeFinished (ShopItem item)
    {
        if(item .SKU =="gold2000"){
            handler .newGold2000 (2000);

        }

    public void OnGetPurchasesFinished (string allRawSKU, int length)
    {
       
    }
   
    public void OnSetupSuccessful ()
    {
       
    }
   
    public void OnProblemSettingUpIAB (string message, StoreErrorCodes errorCode)
    {
        throw new System.NotImplementedException ();
    }
   
    public void OnFailedToQueryInventory (string message, StoreErrorCodes errorCode)
    {
        throw new System.NotImplementedException ();
    }
   
    public void OnMissingToken (string message, StoreErrorCodes errorCode, ShopItem item = null)
    {
        throw new System.NotImplementedException ();
    }
   
    public void OnSubscriptionNotAvilable (string message, StoreErrorCodes errorCode, ShopItem item = null)
    {
        throw new System.NotImplementedException ();
    }
   
    public void OnFailedToConsumePurchase (string message, StoreErrorCodes errorCode, ShopItem item = null)
    {
        throw new System.NotImplementedException ();
    }
   
    public void OnConsumeFinishedListenerError (string message, StoreErrorCodes errorCode, ShopItem item = null)
    {
        throw new System.NotImplementedException ();
    }
   
    public void OnPurchaseFailed (string message, StoreErrorCodes errorCode, ShopItem item = null)
    {
       
       
    }
   
    public void OnPurchasePayloadVerificationFailed (string message, StoreErrorCodes errorCode, ShopItem item = null)
    {
        throw new System.NotImplementedException ();
    }
   
    public void OnUserCancelled (string message, StoreErrorCodes errorCode, ShopItem item = null)
    {
        StartCoroutine (wait ());

    }
   
    public void OnUnknownError (StoreErrorCodes errorCode, string message = "", ShopItem item = null)
    {
        throw new System.NotImplementedException ();
    }
   
    #endregion
    IEnumerator wait(){
        yield return new WaitForSeconds (1);

    }
2

no answer?