I'd second the Geekvape forum, they may be able to assist you with getting it repaired. Also (I have yet to do mine) I hear the latest update gives a lot better battery life, if you can get your battery door resolved, well, it might be nice to not be changing them as much. Mine has loosened up a smidge, but other than that it has been fine (I do agree with you about battery doors and Achilles heels and whatnot) and good luck!
Anna