Redirect to list view after SPServices Update

Hello Techies,
I created a custom form to submit list item and attach multiple attachments.

And would need to redirect user to default list view after all the attachments are attached to a list item.
I tried adding window.location.href='default List url' but it redirects while the attachments are getting added.
It works fine for small file(s) but for large file(s), only 1 attachment gets added.
Here is the snippet:
HTML:

  
<table align="left" border="1" cellpadding="0" cellspacing="0" >  
<tbody>  
<tr>  
<td  valign="top">  
<h3> Nameh3>  
td>    
<td valign="top" style="padding:9px;">    
<input type="text" value="" maxlength="255" id="Title" title="Name" style="width: 96%;" ms-spellcheck-true">    
td>  
tr>  
                                  
<tr >  
<td >  
<span style="font-family: " segoe ui" ,sans-serif; color: #444444">  
Click here to attach file  
span>   
<div id="attachFilesHolder ">    
 <input type="file" id="attachment" name="FileUpload" multiple/>  
div>    
td>  
<td>  
td>  
tr>  
table>  
<div>  
<input name="SaveItem" style=" height: 40px; font-size: 15px;" id="NewSaveItem" accesskey="O" onclick="" type="button" value="Click here to submit " target="_self">  
div>  
And here is my js:

var ListTitle = "SubTask";  
  
$( document ).ready(function() {  
//$('#attachment').multifile();  
    $("#NewSaveItem").click(function() {  
    CreateNewItem();  
           
});  
      
      
});  
  
function CreateNewItem() {  
    var data = {  
        __metadata: { 'type': "SP.Data.SubTaskListItem" },  
        Title: $('#Title').val()  
    };  
  
    $.ajax({  
        //_spPageContextInfo.webAbsoluteUrl get current SharePoint site url  
        url: _spPageContextInfo.webAbsoluteUrl + "/_api/Web/Lists/GetByTitle('" + ListTitle + "')/Items",  
        type: "POST",  
        headers: {  
            "accept": "application/json;odata=verbose",  
            "X-RequestDigest": $("#__REQUESTDIGEST").val(),  
            "content-Type": "application/json;odata=verbose"  
        },  
        // to make sync calls.  
        async: false,  
        data: JSON.stringify(data),  
        success: function (data) {  
            if (data.d.ID != undefined && data.d.ID > 0){  
                //Uploads files to SharePoint List item  
                UploadFileToListItem(data.d);  
                  
                }  
            else  
            {  
                console.log('Item added successfully');  
                }  
        },  
        error: function (error) {  
            console.log('Problem saving data');  
        }  
    });  
   // window.location.href = 'https://connect.sharepoint.com/sites/SpApps/Lists/SubTask/';  
  
}  
  
  
  
//Once the item is created now let’s try to upload documents to SharePoint list item.  
  
function UploadFileToListItem(data) {  
    var element = document.getElementById("attachment");  
    lastFileName = element.files[element.files.length - 1].name;  
    for (var i = 0; i < element.files.length; i++) {  
        var file = element.files[i];  
        uploadFile(data, file);  
    }  
    alert('Done');  
    window.location.href = 'https://connect.sharepoint.com/sites/SpApps/Lists/SubTask/';  
}  
  
//uploads single file at a time.  
function uploadFile(data, file) {  
    var getFileBuffer = function (file) {  
        var deferred = $.Deferred();  
        var reader = new FileReader();  
  
        reader.onload = function (e) {  
            deferred.resolve(e.target.result);  
        }  
  
        reader.onerror = function (e) {  
            deferred.reject(e.target.error);  
        }  
  
        reader.readAsArrayBuffer(file);  
  
        return deferred.promise();  
    };  
      
    getFileBuffer(file).then(function (buffer) {  
        var binary = "";  
        var bytes = new Uint8Array(buffer);  
        var i = bytes.byteLength;  
        while (i--) {  
            binary = String.fromCharCode(bytes[i]) + binary;  
        }  
        var fileName = file.name;  
        var error = ''  
        $().SPServices({  
            operation: "AddAttachment",  
            async: false,  
            listName: ListTitle,  
            listItemID: data.Id,  
            fileName: fileName,  
            attachment: btoa(binary),  
            completefunc: function (xData, Status) {  
                console.log(file.name + " uploaded");  
            }  
        });  
    });  
      
      
}