TextMesh isn't updating itself.

Hi, i am new to Unity and trying to make some simple projects to learn it. I want to update textmesh.text everytime when i clicked my gameobject.

i guess this code should do the trick but it doesnt work.

 hptclone.GetComponent<TextMesh>().text=counter.ToString();

 void Update () {
             TimeChange();
             if(control==true)
             {
             hptclone.GetComponent<TextMesh>().text=hp.ToString();
                     counter=hp;
                     Spawner(enemyclone, hptclone);
                     control=false;
             }
  
             if(Input.GetMouseButtonDown(0))
             {
                     if(GameObject.FindGameObjectWithTag("enemy"))
                     {
  
                             counter--;
                 hptclone.GetComponent<TextMesh>().text=counter.ToString();
                             print(counter);
                             if(counter==0)
                             {
                                     score+=10;
                                     Destroy(hpt);
                                     Destroy(enemy);
                                     hp++;
                                     control=true;
                             }
                     }
             }