I did something like that to my original Akiba Yellow. Thank god she was a non-exclusive release, because it was not fixable (I ended up buying a replacement for $25 from amiami.com, because I stupidly assumed there would be no chance of help from Bandai--in a way it was a good thing because I used to buy Sentai Figuarts from ebay and yesasia like a moron paying the ridiculous mark ups), but after dealing with the Good Smile Company for replacement Nendoroid pieces, I think Bandai would be pretty okay as long as you took photos, and it was with in 12 months of release.
Of course, being an SDCC one, it's distributed by Bluefin instead right? So hit them up on their Facebook page and they should help. They're pretty quick to reply to thing.