Recording in DB does not work when using alertigo.js

I have a code to update and delete data in the database so unfortunately it shows the custom alert on the screen, so it does not record in the database and neither updates the bad page, so it does not display the custom alert.

I'm using alertigo.js and modal.

Is there any way how to do so when updating data or deleting it shows this custom alert and saves the data in the database? I already researched so much and could not find something that could help me.

<div class="modal fade" id="add_evento" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
                <div class="modal-header">
                    <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                        <h4 class="modal-title" id="exampleModalLabel">Funcionario</h4>
                </div>
                <div class="modal-body">

                    <div class="panel-group">
                        <div class="panel panel-default ">
                            <div class="panel-heading funcionario"></div>
                            <div class="panel-body funcao">Panel Content</div>
                        </div>
                    </div>
                    <form method="POST"  id="myForm" enctype="multipart/form-data">
                        <input type="hidden" name="id_func" id="id_func">
                        <input type="hidden" name="nome" id="nome">
                        <input type="hidden" name="funcao" id="funcao">

                        <div class="form-group">
                            <label for="recipient-residente" class="control-label">Residência (Sua residência atual):</label>
                            <input type="text" class="form-control" name="residente" id="residente" >
                        </div>
                        <div class="form-group">
                            <label for="recipient-naturalidade">Natural de:</label>
                            <select class="form-control" id="naturalidade" name="naturalidade">
                               <option value="Luanda">Luanda</option>
                               <option value="Cabinda">Cabinda</option>
                               <option value="Benguela">Benguela</option>
                               <option value="Huila">Huíla</option>
                            </select>
                        </div>
                        <div class="form-group">
                            <label for="recipient-residente" class="control-label">Trocar a foto</label>
                            <input type="file" name="foto" multiple id="ssi-upload" class="form-control"/>  
                        </div>
                        <div class="form-group">
                          <label for="description">Quem Você é:</label>
                          <textarea class="form-control" rows="5" id="description" name="description"></textarea>
                        </div>
                        <div class="modal-footer">
                            <button type="submit" class="btn btn-info">Alterar</button>
                            <button type="button" class="btn btn-default" data-dismiss="modal">Cancelar</button>
                        </div>  

                    </form>
                </div>            
            </div>
        </div>
    </div>

AJAX Code

 $(document).ready(function(){
    $('#myForm').submit(function (e) {

        e.preventDefault();
        var productId = $('#myForm').serialize();



        $.ajax({
            type: "POST",
            url: "update_func.php",
            data: productId,
            success:function(productId){
                alertigo('This is a LIGHT-BLUE alertigo.js notification message!', {color: 'light-blue'});
            }
        });         

    });
});

Redirecting to PHP

$panel_atual = "funcionario";

require "../config.php";

$id = intval($_POST['id_func']);
$nome =  $_POST['nome'];
$naturalidade =  $_POST['naturalidade'];
$residente =  $_POST['residente'];
$description =  $_POST['description'];
$imgvar_func = $_FILES['foto']['name']; 

if (file_exists("img_func/$imgvar_func")) {
    $a = 1;
    while (file_exists("img_func/[$a]$imgvar_func")) {
            $a++;
        }
        $imgvar_func = "[".$a."]".$imgvar_func;
}



$result_edit = "UPDATE funcionarios SET naturalidade='$naturalidade', residente='$residente', description = '$description', imagem = '$imgvar_func' WHERE id='$id_func' AND nome='$nome'";

$resultado_edit = mysqli_query($conexao, $result_edit); 
(move_uploaded_file($_FILES['ssi-upload']['tmp_name'], "img_func/".$imgvar_func));


    if ($resultado_edit) {
        echo "<script type='text/javascript'>window.alert('Dados alterados com sucesso!');window.location='index.php';</script>";
    }else{
        echo "<script type='text/javascript'>window.alert('oops! Houve um problema. Tente novamente, por favor!');window.location='index.php';</script>";
    }