Problem With The Shooting Script

Sorry Everyone But I'm new in Unity. I want to build a mobile game. But I Have some Problems with my shooting script: The Script is Below:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
  
 public class GameManager : MonoBehaviour
 {
  
     #region Singleton class: GameManager
  
     public static GameManager instance;
  
     void Awake()
     {
         if (instance == null)
         {
             instance = this;
         }
     }
  
     #endregion
  
     Camera cam;
  
     public PlayerController ball;
     public TrajectoryScript trajectory;
  
  
     [SerializeField] float pushForce = 4f;
  
     bool isDragging = false;
     int canMove = 0;
     Vector2 startPoint;
     Vector2 endPoint;
     Vector2 direction;
     Vector2 force;
     float distance;
  
     //---------------------------------------
     void Start()
     {
      
         cam = Camera.main;
         ball.DesactivateRb();
     }
  
     void Update()
     {
         Debug.Log(ball.rb.velocity.y);
         if (ball.rb.velocity.y == 0 )
         {
             canMove = 1;
          
             if (Input.GetMouseButtonDown(0) && canMove ==1  )
             {
              
                 isDragging = true;
                 OnDragStart();
              
  
             }
             if (Input.GetMouseButtonUp(0) )
             {
                 isDragging = false;
                 OnDragEnd();
                 canMove = 2;
                 force = Vector2.zero;
             }
  
             if (isDragging )
             {
              
                 OnDrag();
              
              
             }
  
         }
      
  
      
     }
  
     //-Drag
     void OnDragStart()
     {
      
         ball.ActivateRb();
             startPoint = cam.ScreenToWorldPoint(Input.mousePosition);
             trajectory.Show();
  
     }
  
     void OnDrag()
     {
  
             endPoint = cam.ScreenToWorldPoint(Input.mousePosition);
             distance = Vector2.Distance(startPoint, endPoint);
         if (distance >= 1.2f)
         {
             distance = 1.2f;
         }
             direction = (startPoint - endPoint).normalized;
             force = direction * distance * pushForce;
             //just for debug
             Debug.DrawLine(startPoint, endPoint);
             trajectory.UpdateDots(ball.ballPos, force);
  
      
     }
  
     void OnDragEnd()
     {
         distance = 0;
      
         //push the ball
         ball.ActivateRb();
         ball.Push(force);
         trajectory.Hide();
      
     }
  
 }

My problem is when i get my player into the elevator . The Elevator will auto move up and down. So The Player And Camera Move Up and down too .Futhermore, Because the cam move up and down automatically so the end point will not in the position i want . So i hope everybody suggest me some solutions to solve this problem :((. AH ! another question that :( when the elevator goes down i see that the ball auto jump up :( i don't know why ?

Image1: https://forum.unity.com/attachments/upload_2021-8-7_15-59-52-png.903464/

Image2: https://forum.unity.com/attachments/upload_2021-8-7_16-1-45-png.903470/

Image3: https://forum.unity.com/attachments/upload_2021-8-7_16-1-21-png.903467/

[preview of external content removed for GDPR compliance as it was including 3rd party cookies]