this happened to me in my XJ- getting locked in part time.
i dont know if this will help but ill wing it out anyways.
what i had to do was keep trying shifting it while the car is in neutral position over and over until it get out in normal 2 wheels. back and forth back and forth, shifting here shifting there, sometimes i had to drive just fast enough to get it out of that mess. i hated the lever settings, id pray not to get stuck in that mess every time id need my full time 4wd. full time 4wd still a blast in my XJ. i use it every winter hauling wooden logs up a steep hill along side our house. shes still a champ- just never liked part time anything- haha
gl with your situation though