Try changing your client. I had problems like this once with Bittorrent, changing to Vuze seems to do the trick.Stuff like that doesn't work, they have flagged my IP or something.
Luckily, I haven't run into a case where I couldn't find a good torrent for an anime I wanna watch. Kickasstorrents and Thepiratebay FTW!!
They can't really perma ban you unless you have a static IP.