If you haven't already, make sure the pictures you submit are very clear and against a white background (if they asked you to submit photos).
In addition to the previous comment, it's worth considering that not as many people are buying from FP,
Rebag, etc. right now for a multitude of reasons (e.g. the economy in the US and increase in travel). Also, they may have enough B35s that haven't been sold yet, even if you don't see them on the website.
My recommendations are to 1.) Wait and try again in a month, 2.) Try FP because they give higher quotes usually, 3.) If you want more info, contact support and they can tell you the reason they didn't accept your bag.