Recap. (not as in caps)
Since we are not able to get into the router to see if it has metering you'll have to install metering on devices that use this ISP.
Reading https://discussions.apple.com/thread/5518918 coughs up a few clues about "DadMn" and Downcast but let's move forward now that you know those items.
Read http://www.cultofmac.com/172461/never-worry-about-your-data-limit-again-with-dataman-pro-for-ipad-review/ next.