Fuel tank release button doesnt work is there an emergency switch somewhere to open it?

If you mean the fuel door... if it is not unlocking make sure the key is on and pull the fuel door button on the driver's side door. Button should be next to the rear hatch button. If it is not releasing check your fuses. If you need fast access remove the carpeted side panel inside of the rear hatch and you will find an emergency release.

Open trunk and pull cable in left rear side trunk panel. This is an emergency release for the fuel door. You may have to pull gently out on fuel door while tugging at release cable several times. When the door opens oil latch solenoid tip and bend tab on door latch about 2mm towards hinge.
The fuel door is flimsy and tends to get bent. Once it is bent it prevents the latch solenoid tip from releasing the door latch.

If your fuel tank release has failed, go into trunk/boot and pull back liner on side (fuel filler side) and you will find a cable made for emergency access to fuel filler.

The fuel filter is serviced only as part of the left fuel level sensor assembly in the fuel tank

1. Remove rear seat bench

2. Fold carpet forwards

3. Fold back rubber mat

4. Remove the nuts and fold back metal cover

5. Disconnect electrical connector

6. Release and disconnect fuel feed and return lines

CAUTION: The fuel gauge must roughly indicate zero before the left tank opening is opened. Large quantities of fuel may emerge upon opening. If necessary, keep the left tank opening closed and feed an extraction hose through the right service opening to the left tank half and drain the fuel out of the left tank area before proceeding.

7. Release the screw cap

8. Carefully raise fuel level sensor until sensor flange emerges.

CAUTION: Risk of breakage! When raising sensor unit, do not pull excessively on connecting piece of fuel return line.

9. Disconnect line to fuel filter

10. Disconnect suction jet pump from fuel filter (Press catch downwards to detatch suction jet pump)

11. Remove left sensor unit from the tank.

12. Reverse order to install

emergency button it aint got.....pull away the trim inside the trunk to get to the release wire.(what car has an emergency button,never heard of one...)

yes their is an emergency pull cable somewhere in the boot

The quick solution until you get it fixed is use the emergency fuel door release in the trunk through the circle access hole. You must pull the cable down not towards you. and you must use much more force than you would expect.

The actual problem can be any one of these...
cable, solenoid, actuator, switch, cable plugged into switch.

unplug the button and try to jump the plug

there is a second release inside the trunk, it is a cable with a plastic pull handle on it.

Try having a second person pull on the door as you press the button, and also listen by the door to see if you can hear the release latch working. Also, open your trunk, and on the same side as your gas tank will be a little pull handle as an emergency release for your fuel door. It may be behind the trunk liner, but usualy they are easily accessable. and if you have any other problems, refer to the owner's manual to locate the release.