Key stuck in ignition, no power to car. Please Help before my car gets stolen!?

[sara d]

I just went to the store, and when I came back out to my car I used the remote to open the trunk. I got in and put my key in the ignition. After that I turned it to start the car and it didn't turn over, as soon as I let go I realized that it was stuck. I can't turn the key back. The wheel is not locked. There is no power to my car at all, the remote doesn't work the lights etc. I can not put it into gear. I don't know what to do... it is still in the store parking lot with a chance that someone could steal it...(keys in it can't lock it with keys in the ignition) Please help!!