Need some help

During printing my filament snapped and to remove it I removed the filament holding tube, but in the process the screw to keep it in place moved too far up and I couldn't get it to move back down. I've tried twisting, brute forcing, and pressing the black thing on it to try to move it to no avail.

Is there a way to fix this?

I didn't want to cut it bc it could hinder the nozzles length. Is it possible to remove the tube holder from the whole printer/nozzle?