See if you could determine if the linkage is moving between the shifter and the transmission. Maybe the shifter is moving, but your linkage disconnected, not allowing you to make the changes at transmission. Remove the consold or shifter boot cover to view the linkage inside the car. Move the shifter and inspect the shift cables, if they appear working and connected, go the where they end at the trans, and do the same, have someone move the shifter and look for corresponding movement. If not, you broke a shift cable. Let me know if you need more help.
Ivan
ASE Certified Master Technician
ASE Master Tech w/ 19 years in the field. Self employed for 9 years. Member of AUTOLAB radio show.