Demandforce review: they didn't return my money back. don't do business with them

I decided to place the ad on my car, so I contacted the rep from the company www.demandforce.com. The rep spoke with me and told to wait. I was on hold within 40 minutes, but no one continued the conversation with me. I sent the email, where I asked to cancel my order and return my money back. After 2 weeks still no response and no idea what to do now. Maybe someone has any ideas how to return money back, please contact me then or leave a comment. Thanks.