How to insert a single row to a WordPress database table?

Intro:

I have a function that handles a contact form variables in my website.

  • user enters name, email and text.
  • function.php gets variables using javascript.
  • I get more information on the user on the way – like IP, Country, UTM tags if any, ect.

Then I added a code part that saves the variables respectively on a SQL table.

I created the table ‘wp_contact_form’ using phpMyAdmin.

used this code part in a function:

global $wpdb; 

$wpdb->insert( 
    'wp_contact_form', 
    array( 
        'con_ip'          => $_COOKIE['ip'], 
        'con_name'        => $fullname, 
        'con_email'       => $email, 
        'con_text'        => $message, 
        'con_country'     => $_COOKIE['country'], 
        'con_reigon'      => $_COOKIE['region'], 
        'con_city'        => $_COOKIE['city'], 
        'con_utm_source'  => $_COOKIE['utm_source'], 
        'con_utm_medium'  => $_COOKIE['utm_medium'], 
        'con_utm_campain' => $_COOKIE['utm_campaign'], 
        'con_utm_term'    => $_COOKIE['utm_term'], 
        'con_utm_content' => $_COOKIE['utm_content']
    ), 
    array( 
        '%s', 
        '%s', 
        '%s', 
        '%s', 
        '%s', 
        '%s', 
        '%s', 
        '%s', 
        '%s'
    ) 
);

And I still get a blank table.
I tried following this:
https://codex.wordpress.org/Class_Reference/wpdb#INSERT_rows

without any success.

db structure:
http://i.stack.imgur.com/kQ8oZ.png
enter image description here

Full function code:

/**
    Contact form using Ajax 
**/ 

add_action('wp_ajax_nopriv_submit_contact_form', 'submit_contact_form'); 

// Send information from the contact form 
function submit_contact_form(){

    // Get the UTM variables from the 'get_the_utm_vars()' function
    //$utm = get_the_utm_vars();

    // If there is a $_POST['email']...
    if( isset($_POST['email']) && ($_POST['validation'] == true ) ) {

        // Get parameters
        $email = $_POST['email']; // Gets the email of the user..
        $email_to = "arik@ example.pro";
        $utm_emails = array(
            'tova@ example.pro',
            'yonatan@ example.pro', 
            'arik@ example.pro',
            'gal@ example.pro',  
            'shai@ example.pro',  
            'walid@ example.pro'        
            );
        $fullname = $_POST['fullname'];
        $message = $_POST['text']; 
        $email_subject = " example Intro: $email";      
        $headers = array(
                'From: '. $fullname .' <'. $email .'>', 
                'BCC:  yonatan@ example.pro', 
                'BCC:  gal@ example.pro', 
                'BCC:  eran@ example.pro', 
                'BCC:  tova@ example.pro', 
                'BCC:  walid@ example.pro', 
                'Content-type: text/html; charset="UTF-8"; format=flowed rn'
            ); 
        $utm_headers = array(
            'From: '. $fullname .' <'. $email .'>'
            );


        // Send email to YH, and if sent - do:
        if ( wp_mail($email_to,$email_subject,$message,$headers) ) {

            // Tells me that the mail has been sent
            echo json_encode( array("result"=>"complete") );

            //Add the UTM variables to the emails text
            $message .= "rn rn rn IP: ". $_COOKIE['ip'] ."rn Country: ". $_COOKIE['country'] ."rn Region: ". $_COOKIE['region'] ."rn City: ". $_COOKIE['city'] ." rn UTM Source: ".$_COOKIE['utm_source']." rn UTM Medium: ".$_COOKIE['utm_medium']." rn UTM Campaign: ".$_COOKIE['utm_campaign']."rn UTM Term: ".$_COOKIE['utm_term']." rn UTM Content: ".$_COOKIE['utm_content']." ";
            // A mail for tova with the UTM paramseters
            wp_mail($utm_emails,$email_subject,$message,$utm_headers);


        } else {
            echo json_encode(array("result"=>"mail_error"));
            var_dump($GLOBALS['phpmailer']->ErrorInfo);
    }
        wp_die();
    }










    global $wpdb; 

    $wpdb->insert( 
        'wp_contact_form', 
        array( 
            'con_ip'          => $_COOKIE['ip'], 
            'con_name'        => $fullname, 
            'con_email'       => $email, 
            'con_text'        => $message, 
            'con_country'     => $_COOKIE['country'], 
            'con_reigon'      => $_COOKIE['region'], 
            'con_city'        => $_COOKIE['city'], 
            'con_utm_source'  => $_COOKIE['utm_source'], 
            'con_utm_medium'  => $_COOKIE['utm_medium'], 
            'con_utm_campain' => $_COOKIE['utm_campaign'], 
            'con_utm_term'    => $_COOKIE['utm_term'], 
            'con_utm_content' => $_COOKIE['utm_content']
        ), 
        array( 
            '%s', 
            '%s', 
            '%s', 
            '%s', 
            '%s', 
            '%s', 
            '%s', 
            '%s', 
            '%s'
        ) 
    );







}


Source: wpdb

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