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.
Delaware is commonly used to create "fake" companies due to there lack of company transparency laws.
registrant-firstname: Tom
registrant-lastname: McCabe
registrant-street1: 60 W 23rd St
registrant-street2: Apt. 550
registrant-pcode: 10010
registrant-state: NY
registrant-city: New York
registrant-ccode: US
registrant-phone: +1.2038502427
registrant-email: pphysics141@gmail.com