The OP stated that he put the sleeve and face plate back on but could not turn the valve. The cartridge has an inner and an outer section. The outer section sits in the brass housing, with ports lined up inside the valve body. It does not move. The handle pulls the center part out for volume and then left or right for more hot or cold. If the sleeve and faceplate are installed properly, the stem on the inner part should rotate freely. If it does not rotate, then either the cartridge is defective (unlikely unless it was damaged during placement) or something is binding on the handle.
There is a small notch on one side of the end of the stem of the cartridge. that should be facing up when you put the handle onto the stem.
If you do have hot and cold reversed, do NOT remove the retainer clip or turn off the water. Just rotate the stem 180 degrees.
$500+ to replace a $25 cartridge!!!