Have you called BCseeds calmly? If you have proof they sent you something then they have to have an order for you. I doubt they just pick random addresses and send them seeds broken or not.
Unfortunately, I think you got beat, sorry man. If it sounds to good to be true, then it probably isn't.
Learn from it, your not the first person to get beat, try and resolve it with BCseeds and if you can't accept it and move on.
As far as your collective, there is a lesson to be learned there too. The collective should make descisions on seed purchases, with other's imput maybe you wouldn't have bought those seeds. It sounds like ( and this is not a diss) you weren't qualified to make this decision. A strain as good as that strain says it was would have to have something writen somewhere on the internet. Personally, If I came across a strain like that I would have posted pics, reviews, ect.
Next time, look at a few seed banks and compare, find a seed you like and post on here before you order to see if anyone has had history with strain or seed bank, and read the fine print...
Hopefully you can find a good head stash and smoke your troubles away