2000 Chevy Malibu ignition switch security

Electrical problem
2000 Chevy Malibu 6 cyl Front Wheel Drive Automatic

car recently had engine work performed. After the car was home with us, a family member who suffers from dementia tried to stick a key (not the actual car key) in the ignition switch and now I cannot get the switch to turn. My mechanic suggested that a security alarm was tripped and that he can reset it, however, I am trying to avoid another towing charge. Anyway that I can reset it myself or do I need to install a whole new ignition switch.