move a child object to a specific xyz coordinates

hello i have a problem when trying to move my camera to a xyz coordinates relative to the parent object (3rd person controller) im using this class/script attached to the camera, and calling it's methods from another script with the xyz values.

 using UnityEngine;
 using System.Collections;
 
 public class PosCam : MonoBehaviour {
 
     public void chPos(Vector3 val)
     {
         this.transform.position = val;
         //transform.position = val;
         //gameObject.transform.position = val;
     }

     public void chPos(Vector3 val, float x, float y, float z)
     {
         this.transform.position = val;
         //transform.position = val;
         //gameObject.transform.position = val;
        this.transform.Rotate(x, y, z);//no problem in this line for now
     }
 }

the problem is, no matter if i send 0,0,0 as the "val" value, this is sending the position of my camera to a crazy position like 500,-9,80 something like that. image with the hierarchy attached, my player seems like that

pd: im trying to move my camera for a "first person view" in some places.

any suggestion will be very appreciated. thanks for reading