HelloCustomerand welcome to justanswer.com,
First bring the pedal back up. Then open the bleeder on the clutch slave and fill the reservoir and let it gravity bleed (just run out( for a few minutes. Close the bleeder screw have some one pump the pedal, if they have to pull the pedal back up by hand then so be it, then have them hold it down while you open the bleeder screw. Close the screw and have them pump it again. You may have to do this for a while, air in the clutch hydraulic system is hard to get out.
Also if you still can't seem to get a pedal you might end up replacing the clutch master cylinder and slave.
let me know how it turns out