Welcome to the forums.
First and foremost, relax! Being impatient is what got you into this mess to begin with. NEVER disconnect a device while it is uploading the OS. Wait until it comes back to the home screen. Follow these steps closely and be very patient.
What to do next if Jl Cmder will not connect and wipe - BlackBerryFAQ
This will leave you with a 507 error on your device. It sounds like you already have, but if you haven't, download and install an OS to your PC. It will prompt you to load the OS at that point.
Again, take your time and be patient.