Character only goes up during wall jump,Wall jump only goes up

I've been following some tutorials on how to make a platformer and on how to wall jump, but I'm having no luck getting the character to do what I'd like him to do. Here is the code for the players movement. At the moment, all the player does is jump up higher on the vertical axis after pressing "Jump" against the wall. I'd like for him to travel back to the opposite wall, but I've been having no luck doing so...

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Player_Movement : MonoBehaviour
 {
     public float moveSpeed;
     //public Rigidbody rB;
     public float jumpForce;
     public CharacterController controller;
 
     private Vector3 lastMove;
     private Vector3 moveDirection;
     public float gravityScale;
     public float verticalVelocity;
 
     public Animator anim;
     public Transform pivot;
     public float rotateSpeed;
 
     public GameObject playerModel;
 
     public float knockBackForce;
     public float knockBackTime;
     private float knockBackCounter;
 
 
     // Use this for initialization
     void Start ()
     {
         //rB = GetComponent<Rigidbody>();
         controller = GetComponent<CharacterController>();
     }
     
     // Update is called once per frame
     void Update ()
     {
         //rB.velocity = new Vector3(Input.GetAxis("Horizontal") * moveSpeed, rB.velocity.y, Input.GetAxis("Vertical") * moveSpeed);
 
         /*if(Input.GetButtonDown("Jump"))
         {
             rB.velocity = new Vector3(rB.velocity.x, jumpForce, rB.velocity.z);
         }*/
 
         //moveDirection = new Vector3(Input.GetAxis("Horizontal") * moveSpeed, moveDirection.y, Input.GetAxis("Vertical") * moveSpeed);
 
         if (knockBackCounter <= 0)
         {
             float yStore = moveDirection.y;
             moveDirection = (transform.forward * Input.GetAxis("Vertical")) + (transform.right * Input.GetAxis("Horizontal"));
             moveDirection = moveDirection.normalized * moveSpeed;
             moveDirection.y = yStore;
 
             //controller.Move(moveDirection * Time.deltaTime);
             lastMove = moveDirection;
 
             if (controller.isGrounded)
             {
                 moveDirection.y = 0f;
                 if (Input.GetButtonDown("Jump"))
                 {
                     moveDirection.y = jumpForce;
                 }
             }
         }
         else
         {
             knockBackCounter -= Time.deltaTime;
         }
 
         moveDirection.y = moveDirection.y + (Physics.gravity.y * gravityScale * Time.deltaTime);
         controller.Move(moveDirection * Time.deltaTime);
 
         //Move player in different directions based on camera look direction
         if(Input.GetAxis("Horizontal") != 0 || Input.GetAxis("Vertical") != 0)
         {
             transform.rotation = Quaternion.Euler(0f, pivot.rotation.eulerAngles.y, 0f);
             Quaternion newRotation = Quaternion.LookRotation(new Vector3(moveDirection.x, 0f, moveDirection.z));
             playerModel.transform.rotation = Quaternion.Slerp(playerModel.transform.rotation, newRotation, rotateSpeed * Time.deltaTime);
         }
 
         anim.SetBool("isGrounded", controller.isGrounded);
         anim.SetFloat("Speed", (Mathf.Abs(Input.GetAxis("Vertical")) + Mathf.Abs(Input.GetAxis("Horizontal"))));
     }
 
     private void OnControllerColliderHit(ControllerColliderHit hit)
     {
         if(!controller.isGrounded && hit.normal.y < 0.1f)
         {
             if(Input.GetButtonDown("Jump"))
             {
                 Debug.DrawRay(hit.point, hit.normal, Color.red, 1.25f);
                 moveDirection.y = jumpForce;
                 Vector3 hitDirection = hit.transform.position - transform.position;
                 hitDirection = hitDirection.normalized;
             }
         }
     }
 
     public void KnockBack(Vector3 direction)
     {
         knockBackCounter = knockBackTime;
 
         moveDirection = direction * knockBackForce;
         moveDirection.y = knockBackForce;
     }
 }