Take my money PLEASE!

I advertise homes for sale each week in the New London Day. At the end of every month I get a bill. I pay the bill on time. Simple concept. Until this month. I advertised but received no bill. I called accounting first thing Monday morning. I called my account rep on Tuesday. No one has called me back. Maybe they feel guilty taking my money for advertising that doesn't work? Print advertising is stupidly expensive considering (according to Realtor.com) you are 400% more likely to get a response from a consumer on the internet than you are from the newspaper. There have been plenty of blogs and news stories associating print advertising with dinosaurs. I get the picture.