Based on this morning I suspect the Carfax folks aren't watching social media enough to notice this but what the heck; this is a copy of a message sent through their complaint form.
Why is someone link spamming my forum with links to flood[dot]carfax[dot]com?
Someone just tried to spam my technical, non auto-related product support forum with a link to your microsite. Link spammers don't do this for no reason; someone is paying them, and that someone has to have a vested interest in Carfax. So I suggest you find out which of your suppliers has no ethics and fire their sorry ass.
By the way, my site has a great Google reputation. I replaced the link with a link to the highest ranked competitor I could find in your market. This will have the effect of reinforcing their search rank, which in turn should keep Carfax buried in obscurity for longer.
You should really consider hiring an ethical SEO agency instead of figuring you can get this for cheap. If you're not spending $2000/month or more you're probably dealing with a hack. If you're paying more than that, sue them.
Have a nice day.