You may want to resolve this with WOT -- with the Firefox WOT plugin, I get a big warning that I have to click through in order to visit your site, not to mention that there's derogatory comments & marks for your site. Check out the link I posted above and follow the resolution procedures. Someone is bad-mouthing your site / domain if it's not true...
One thing really missing on your website is some information on who runs it.
You provide a commercial service, but no information at all about your identity. Are you an individual or a company ? Where are you based ? Without this information, how do you expect us to trust you and provide you with our credit card information?