Payment not reflecting and non responsive website

<p>I have paid my etoll acount but you still keep on sending me an invoice showing the amount that I have already paid as outstanding.</p> <p> </p> <p>Your website is the slowest non functional site that I have come accross. I wanted to find out if there is an email address where I can send my proof of payment.</p> <p> </p> <p>Please contact me in this regard.</p>