CancelInvoke cant cancell

Unity Engine
1

I try to do CancelInvoke inside Update (to somehow have control over Invoking), and its still executing. Its like it wont cancell invoked function. I can still hear the audio and so on.

     using UnityEngine;
     using Random = UnityEngine.Random;
    
     public class TelephoneBooth : MonoBehaviour
     {
         public AudioClip ringSound;
         public AudioSource source;
         public bool _isOpen;
         void Start()
         {
             //Open();
         }
     private void Update()
     {
         if (_isOpen && !IsInvoking("Open"))
         {
             Invoke ("Open", 3);
             Debug.Log("Invoked");
         }
        
         if (!_isOpen && IsInvoking("Open"))
         {
             CancelInvoke ("Open");
             Debug.Log("CANCEL");
         }
     }
         void Open()
         {
             InvokeRepeating("Ring", 0, 3.0f);
             InvokeRepeating("ShakeThePhone", 0, 0.1f);
         }
         void Ring()
         {
             source.PlayOneShot(ringSound);
         }
         void ShakeThePhone()
         {
             transform.localScale = new Vector2(1f, Random.Range(0.1f, 0.3f)+1f );
         }
     }
2

CancelInvoke (); solves the issue - cancelling everything