Your form action is set to: action="php/contactWO.php"
it should just be: action="contactWO.php"
That will cause your form to submit and email to send. However you have a javascript library that is causing your form to submit using AJAX, so the redirect and success page isn't displaying. You will have to look into the documentation for the library you are using for how to cause it to go to another success page after the form submits.