Sadly, the SSD maybe gone.
I would recommend you contact OWC to see if they have any ideas on recovering your drive. They may have a SSD firmware update which might fix things, otherwise you'll need to get a new drive (they may cover it under warranty).
Hopefully you have a good backup of anything important. If not, to recover any files if you can you'll need to first have a bootable system and then a means to connect the SSD independently to it.
I would put in a spare drive replacing the SSD, then use something like this: Startech 2.5" SATA to USB adapter to connect the SSD when I was ready to try to recover the files from it. That way I could get the system up and running using OS recovery services. Or, I would plug in a bootable external drive (Thunderbolt, FireWire or USB) that I already have setup as a bootable drive (A 16 GB USB thumb drive will work as well). If you have access to a second Mac system you could create that following this Apple T/N: How to install OS X on an external drive connected to your Mac.
Then using a good file recovery app like: Prosoft - Data Rescue installed on the spare internal drive I put in or the external drive boot drive to see if I could recover anything important on the SSD.