BitTorrent doesn't download a file.?

I watch movies everyday and I download at least two movies a day from The Pirate Bay using Bit Torrent. A few weeks later, I noticed that it took more time to download a 700 MB movie than before. My friend told me that my bandwidth was being throttled by my ISP and he suggested Hotspot Shield. I remember this program being installed when I installed Bit Torrent but I removed it because I don't trust it. Now that I'm using this VPN software, my IP add was changed so my ISP can't detect my activities but Bit Torrent no longer resumes downloading and gets stuck at "Downloading Metadata" or "Checking".

I want to find a way to make BitTorrent and Hotspot Shield work together because I don't want my bandwidth to be throttled every time I use a torrent downloader. I'm still thinking twice on trying another torrent downloader 'cause I don't want install any more programs and BitTorrent is the only one I trust. Do you know a solution?