Return of Reckoning

So i downloaded the game for my my new computer via using torrent. I did everything, did the administration thing and read only uncheck. Problem is my connection is not stable and cuts like in every 30m. When connection lost an error apears on launcher and everything stops, then i go start launcher again and it starts from rock bottom. I checked the file number appearing on the screen and its always x/16703. So this is the problem, thanks for every answer