I don't know if this will help:
You shouldn't reset a jailbroken device using "Erase all content and settings", because the result would be what you experience now. Connect it to iTunes (computer) and restore it. If restoring doesn't work, try DFU mode. When it "comes to life" again, the jailbreak will be removed, and everything you had stored on it before, will be deleted. If this still doesn't work, use the following instructions to wipe it: TUTORIAL - Failsafe method to restore the current version of IOS Apple iPhone Forum
If the above doesn't help, I ask you to wait patiently. This is an international forum, and the members which might give the advice you need, could be offline at the moment, so it will be necessary to wait quite some time to receive a reply.