I called them, and their rep said the remaining money was sent back to payment method, Bitcoin, call them.
Haha, well at least they're trying to take up some adoption - even if they haven't done any reading or trained their staff. The education should catch on pretty quick; the hard part has always finding retailers who are willing to accept it. Although I am rather amused they assumed that Bitcoin was like another financial entity that could somehow alter transactions, it kind of opposes the whole notion of decentralisation.