Craigslist ignores my issues with paid ad

So I recently posted my car for sale on Craigslist. I went through their obnoxious hoops, even after paying $5 for the listing, you have to go to your inbox, click such and such link, then return to your email, screenshot the email, then reply to a different email with that screenshot. So I do all this. And I wait. And I don't get responses to my posting. Instead I get responses to someone else's posting! Hundreds of them! I wrote to Craigslist about this issue three separate times. They have ignored me. Anyone got any advice?