Client is very upset with this plugin

My client is upset because when a user clicks the submit button, the “Return/Thanks URL” page doesn’t get redirected right away. Instead the same page reloads as if the form is broken then redirects seconds later. What makes things worse is the lack of support you receive from the plugin author and community. The client is also complaining about the lack of SPAM detection – as far as she can tell, the only way to stop spam is via CAPTCHA and this is not a good option as it’s horrible for the user experience.