Use a wooden wedge, air wedge, and a rod to unlock your automobile as long as you can at least partially push the top portion of the door open. First, take hold of the wooden wedge and insert it through the top of the door. Put a cover (ideally plastic) over the wedge to prevent damage to the paint.
To further distance the automobile from the door, slide the air wedge next to the wooden wedge and inflate it with air. Put as much pressure as you can on the wooden wedge to create a wide gap. Finally, carefully unlock your door using the locking mechanism on the side by inserting the rod through the door gap.
You could probably get by without one if you don’t have one. Even though it will be more difficult, the following video makes it seem simple.