Welcome to the forums.
I would try to wipe the device and reload the OS.
Try following these steps How do I wipe the BlackBerry using Jl Cmder? - BlackBerryFAQ
If it doesn't connect, try here: What to do next if Jl Cmder will not connect and wipe - BlackBerryFAQ
Be patient, it may take a while before it connects.
Your profile shows an 8100, if that is correct follow these steps: Latest OS: 8100 126.96.36.199/188.8.131.52 (English & East Asian)
If not, look at the top of the forum for the OS that is for your device.