I also had problems dealing with RevancheLLC.
Like you, I ordered a RAKA keyboard adapter (europian version).
After they send a faulty one, they promised to send me a new one. They also told me it was a problem with the firmware, and that the backup disc with the firmware source code was corrupt, or something like that.
I waited for half a year, and then gave up. They didn't even respond to my emails anymore.
After that, I vowed to never ever order something from them again.