Same happened to me. I sent them a money order, and they keep making excuses. I'm starting to suspect I'm never going to get my money back.
The operator's identity is publicly known (see whois for getbitcoin.com domain) and is based in the U.S. (GetBitcoin LLC is registered entity in the State of Delaware - File# 4997818).
Hopefully, if they are winding down or whatever the situation is they'll either deliver or refund in full.