I can help you on this project to make submit button working, I will rewrite the code & will fix all Issues of the code you are facing.
I have more than 5 years of experience in websites, web portals, web applications and mobile sites through PHP, WordPress, Codeigniter, Larvel, Magento, HTML, HTML5, CSS, Jquery, AJAX, Javascript, JSON, MySQL.
Please message me for more discussion! Sharwan