I can't open the door, I have used the key and tried the combination. I hear the lock disengage but the door won't open. It appears to be stuck. How do I get it open?

Most doors have a Mechanical set up to allow you to unlock it with a flat battery in the fob or the car itself. There should be a key slot in or near the handle to unlock that door. The slot is sometime hidden behind a trim cover on the handle itself.
If the actuator is faulty it could be stuck in the locked position. Sit next to the car and put your ear to the door panel. Use the key remote to lock and unlock the door and listen. If the actuator is working you should hear a clear 'Clunk' noise every time you use the fob.

You should be able to feel the lock disengage. Also feel the latch moving. If you can feel this, then the door is jammed, not the lock or handle. They do swell. You'll just have to force it open. You might try spraying some lube at the top and bottom, where you suggested it feels stuck.

Internal batter is low...look for two pin points on the outside of the combo and attatch a new battery temporairly then work combo. Insert new battery when you get it open. Hope this helps Ed

Lower the back seat and crawl into the trunk and see what the latch is doing when you activate the key fob. the trunk lid will have to be open to enable any repairs. Also an emergency release cable is probably visible (yellow handle) inside the trunk and will Open the trunk lid.

try using some spray on lube in and on the lock mechanism, it might just be stuck.

All locking and unlocking is done through the switch on the drivers door lock. Put the key in the drivers door and lock and unlock several times. See if the boot opens then.
Or make sure you haven't hit the lockout button on the drivers door that stops anyone else from opening their doors. (Including the boot.)

Your power door locke solenoid is seized. You will need to replace it. You are going to have to get the entire door panel off, and then reach in to manually pull the solenoid arm to retract the lock mechanism. Then the door will open.

Instructions:
Opening the key storage
compartment door
1. Open shutter door to reveal the dials
and the release button
2. Rotate dials to the current combination
(if the lock is new, the combination is set
at the factory to 0-0-0-0)
3. Press down on the release button
to open the door
4. Pull the door fully open
5. Add or remove keys
6. Close compartment door
7. Scramble the combination dials to lock
the door and conceal your combination (A)
8. Close the shutter door (B)
To set a new combination:
The initial combination is set at the
factory to 0-0-0-0
1. Open the compartment door
(see instructions above)
2. Push the reset lever left and down.
The lever remains in this position
3. Rotate dials to your desired combination
4. Push the reset lever, up and right, back
to the original position
5. Close the key storage compartment door
6. Scramble the combination dials to lock
the door and conceal your combination (A)
7. Close the shutter door (B)
To hang shackle model
1. Open the compartment door
(see instructions above)
2. Push the shackle release lever to the left
to open shackle
3. Pull the shackle up and out of the lock
4. Place shackle around door knob or other object
5. Close shackle to lock
6. Close the compartment door
7. Scramble the combination dials to lock
the door and conceal your combination (A)
8. Close the shutter door (B)
Reminder:
(A) The release button will open the lock
until you scramble the dials
(B) Keep the shutter door closed to increase
weather resistance and to conceal the
dials from view