Fit Small Business: Get Your Business Into Shape! › Forums › Ask a Question › How do you keep people from just clicking on your add to run you out of money? › Reply To: How do you keep people from just clicking on your add to run you out of money?
Are you aware of certain users that are doing this? If so, you can target your ad so that it doesn’t show to people in the user’s location.
If not, you can try reporting the situation to Google. Here’s an article on how to do this. http://smallbusiness.chron.com/report-fraud-google-64474.html
Good luck with everything!