Contactable contact form not working as wp plugin

Contactable jquery plugin convert into wp plugin. Everything is ok but when submit it always show “Sorry but your message could not be sent, try again later”
My fuction.php is:

<?php
/*
Plugin Name: Jeba form
Plugin URI: https://prowpexpert.com/jeba-form-portfoilo
Description: This is Jeba cute wordpress formable portfolio plugin really looking awesome forming. Everyone can use the cute form plugin easily like other wordpress plugin. By using [jeba_form] shortcode use the slider every where post, page and template.
Author: Md Jahed
Version: 1.0
Author URI: https://prowpexpert.com/
*/
function jeba_form_wp_latest_jquery() {
	wp_enqueue_script('jquery');
}
add_action('init', 'jeba_form_wp_latest_jquery');

function plugin_function_jeba_forms() {
	wp_enqueue_style( 'jeba-form-css', plugins_url( '/contactable.css', __FILE__ ));
	wp_enqueue_script( 'jebacuteform-js', plugins_url( '/jquery.contactable.js', __FILE__ ), true);

}

add_action('wp_footer','plugin_function_jeba_forms');

function jeba_form_plugin_function () {?>

		<div id="my-contact-div"><!-- contactable html placeholder --></div>
		jQuery(function(){
		jQuery('#my-contact-div').contactable(
        {
            subject: 'feedback URL:'+location.href,
            header: '',
            url: 'mail.php',
            name: 'Name',
            email: 'Email',
            dropdownTitle: 'Issue',
            dropdownOptions: ['General', 'Website bug', 'Feature request'],
            message : 'Message',
            submit : 'SEND',
            recievedMsg : 'Thank you for your message',
            notRecievedMsg : 'Sorry but your message could not be sent, try again later',
            footer: 'Please feel free to get in touch, we value your feedback',
            hideOnSubmit: true
        });
	});

<?php
}

add_action('wp_footer','jeba_form_plugin_function');

?>

Demo link: https://laptopidea.com/ left side have a contact buttons.
Thanks