Where can I download the full World of Warcraft game?

I already have a World of Warcraft account, Burning Crusade upgraded and everything, but no matter what I do (open ports, configure firewalls), Blizzard Downloader just isn’t working for me. I need a site where I can manually download and install the full World of Warcraft game, not the trial version. Please help me, I am getting very frustrated with Blizzard over this!