first of all BiglyBT is a Bittorrent protocol whereas I2P is its own protocol. You could try and find another torrent or wait until there's some seeder, which usually happens after some time.
Piracy
Welcome to /c/piracy
No netflix or streaming services landlubbers allowed, this is pirates territory.
You can search for people who'd be likely to seed in forums where they are likely to be. Not sure about the present times, but earlier, demonoid used to be a big forum of this kind.
You can try searching for a different torrent. many torrents exist for same content. find a reputable source and search there. I recommend going to 1337x (dot to) and rarbg (dot to).
you can usually see the amount of seeds listed there. use the one with high seed count with reasonable size.
if it's a movie/TV series, get it's IMDb no and search that on rarbg. eg, if it's IMDb page is imdb.com/tt128493 then search for tt128493 on rarbg.
Don't forget to seed torrents that you used!