Automatics have shift locks. There should be a small piece you can remove.. just to the right or left of the gear indicator (too lazy to go look). Just pry off the little cover and stick a screw driver down in the hole. You'll need to fiddle with the screw driver and the shifter a bit... will probably work.

Only pic I could find. But it should be the only thing around the shifter that looks remotely like it...



You need to push DOWN with the screw driver.

Also. Check that your brake lights come on when you press the pedal. When the switch goes back sometimes they will not come out of park (I know it's not your issue exactly, but easy to check).

 

Even trying the shift lock you can't move it? If you think something is physically blocking it then unplugging a wire won't solve your issue either.

Best bet is to call the dealer, see what they say and what fixes they may have over the phone for you. If not... tow it in.