AUP violation

I was playing on this server when I received an email from my internet provider, Cox Communications. It states that im in an AUP violation of a third party agreement and will be shutting down my internet temporarily. I downloaded the game using your bittorrent link provided and it says that is the cause of the violation, however it only became an issue once I started playing I downloaded the game several days ago and it states the violation took place today, when I logged in and started playing my character. Im just curious if this is a common issue and how I go about fixing the problem. I deleted the bittorrent application and but im not sure if that will stop further issues any insight on the issue would be greatly appreciated.