If your ads are Good or Poor then you have a serious problem to address. Improve the relevance of your page to the keyword you've chosen, remove attempts to harvest personal information, and add other signals of quality (privacy policy, contact link, etc.)
If you can't these days, do a search and take a look at what has changed...are there new competitors? Is the expanded broad match screwing things up so that you're showing along with totally unrelated ads?
Maybe that top position is worth whatever they're spending to be there...I can't believe some of the keywords people are spending $7 a click on, but they do......