It's possible that you may have damaged the slave cylinder during your repair, but it would seem more likely that the disc may be in backwards. I've seen that happen a few times. Is it engaged all the time or disengaged all the time? If it's constantly engaged, that may also point to the disc being reversed. If it is constantly disengaged, the clutch arm and/or throwout bearing may be misaligned or jammed. Sorry to hear about your situation, I know you gotta be as frustrated as all get out! Good luck.