Update function won't update?

Right... Not sure if this is a problem with my coding or the update function is just like... Not working. Also, the Instantiated items are destroyed and then the variables are edited... and so I want to re instantiate them after they have been destroyed. Hope you guys can help me out here.

Here's my code :

 public class IncrShieldHealth : MonoBehaviour {
 
     public static int IncrCost = 400;
     public bool notenough = false;
     public int s = 0;
 
     public GameObject Locked;
 
     public GameObject notEnough;
     public Transform notE;
 
     Text text;
 
     void Start()
     {
         Instantiate (Locked, notE.position, notE.rotation);
         Instantiate (notEnough, notE.position, notE.rotation);
     }
 
     void Update()
     {
         if (ScoreKeeper.Money > IncrCost) {
             if (s == 0) {
                 Instantiate (notEnough, notE.position, notE.rotation);
                 s = s + 1;
             }
         }
     }