Jump problem

hi, i'm making a 2d game. I'm using joystick pack from unity store for player movement,whenever my player collides with walls(box collider) or edge of any collider it jump with a jump force way greater then i had set(250) and also keeps on jumping if i keep on pressing joystick up.Don't know whats wrong,been scratching my head for 2 days.

using UnityEngine; using UnityEngine.Events;

public class CharacterController2D : MonoBehaviour { [SerializeField] private float m_JumpForce = 400f; // Amount of force added when the player jumps. [Range(0, 1)] [SerializeField] private float m_CrouchSpeed = .36f; // Amount of maxSpeed applied to crouching movement. 1 = 100% [Range(0, .3f)] [SerializeField] private float m_MovementSmoothing = .05f; // How much to smooth out the movement [SerializeField] private bool m_AirControl = false; // Whether or not a player can steer while jumping; [SerializeField] private LayerMask m_WhatIsGround; // A mask determining what is ground to the character [SerializeField] private Transform m_GroundCheck; // A position marking where to check if the player is grounded. [SerializeField] private Transform m_CeilingCheck; // A position marking where to check for ceilings [SerializeField] private Collider2D m_CrouchDisableCollider; // A collider that will be disabled when crouching

 const float k_GroundedRadius = .2f; // Radius of the overlap circle to determine if grounded
 private bool m_Grounded;            // Whether or not the player is grounded.
 const float k_CeilingRadius = .2f; // Radius of the overlap circle to determine if the player can stand up
 private Rigidbody2D m_Rigidbody2D;
 private bool m_FacingRight = true;  // For determining which way the player is currently facing.
 private Vector3 m_Velocity = Vector3.zero;

 [Header("Events")]
 [Space]

 public UnityEvent OnLandEvent;

 [System.Serializable]
 public class BoolEvent : UnityEvent<bool> { }

 public BoolEvent OnCrouchEvent;
 private bool m_wasCrouching = false;

 private void Awake()
 {
     m_Rigidbody2D = GetComponent<Rigidbody2D>();

     if (OnLandEvent == null)
         OnLandEvent = new UnityEvent();

     if (OnCrouchEvent == null)
         OnCrouchEvent = new BoolEvent();
 }

 private void FixedUpdate()
 {
     bool wasGrounded = m_Grounded;
     m_Grounded = false;

     // The player is grounded if a circlecast to the groundcheck position hits anything designated as ground
     // This can be done using layers instead but Sample Assets will not overwrite your project settings.
     Collider2D[] colliders = Physics2D.OverlapCircleAll(m_GroundCheck.position, k_GroundedRadius, m_WhatIsGround);
     for (int i = 0; i < colliders.Length; i++)
     {
         if (colliders[i].gameObject != gameObject)
         {
             m_Grounded = true;
             if (!wasGrounded)
                 OnLandEvent.Invoke();
         }
     }
 }


 public void Move(float move, bool crouch, bool jump)
 {
     // If crouching, check to see if the character can stand up
     if (!crouch)
     {
         // If the character has a ceiling preventing them from standing up, keep them crouching
         if (Physics2D.OverlapCircle(m_CeilingCheck.position, k_CeilingRadius, m_WhatIsGround))
         {
             crouch = true;
         }
     }

     //only control the player if grounded or airControl is turned on
     if (m_Grounded || m_AirControl)
     {

         // If crouching
         if (crouch)
         {
             if (!m_wasCrouching)
             {
                 m_wasCrouching = true;
                 OnCrouchEvent.Invoke(true);
             }

             // Reduce the speed by the crouchSpeed multiplier
             move *= m_CrouchSpeed;

             // Disable one of the colliders when crouching
             if (m_CrouchDisableCollider != null)
                 m_CrouchDisableCollider.enabled = false;
         } else
         {
             // Enable the collider when not crouching
             if (m_CrouchDisableCollider != null)
                 m_CrouchDisableCollider.enabled = true;

             if (m_wasCrouching)
             {
                 m_wasCrouching = false;
                 OnCrouchEvent.Invoke(false);
             }
         }

         // Move the character by finding the target velocity
         Vector3 targetVelocity = new Vector2(move * 10f, m_Rigidbody2D.velocity.y);
         // And then smoothing it out and applying it to the character
         m_Rigidbody2D.velocity = Vector3.SmoothDamp(m_Rigidbody2D.velocity, targetVelocity, ref m_Velocity, m_MovementSmoothing);

         // If the input is moving the player right and the player is facing left...
         if (move > 0 && !m_FacingRight)
         {
             // ... flip the player.
             Flip();
         }
         // Otherwise if the input is moving the player left and the player is facing right...
         else if (move < 0 && m_FacingRight)
         {
             // ... flip the player.
             Flip();
         }
     }
     // If the player should jump...
     if (m_Grounded && jump)
     {
         // Add a vertical force to the player.
         m_Grounded = false;
         m_Rigidbody2D.AddForce(new Vector2(0f, m_JumpForce));
     }
 }


 private void Flip()
 {
     // Switch the way the player is labelled as facing.
     m_FacingRight = !m_FacingRight;

     // Multiply the player's x local scale by -1.
     Vector3 theScale = transform.localScale;
     theScale.x *= -1;
     transform.localScale = theScale;
 }

}