I have a problem with the central locking on my 07 plate Galaxy. The rear near side door will not unlock and the child locks are active due to us having two young children. This means we can now not open the door. I have tried locking and unlocking over and over, pushing and pulling the door whilst trying to unlock, and also pulling out the internal lock whilst pulling the external door handle. Still no luck. There appears to be power getting to the lock as you can hear movement in the lock location, but nothing happens. The locking switch also jumps back in as soon as you pull it out and also tries to move when using the key fob suggesting something may be jammed but trying to work. I can not get the internal panel off as the screws are only accessable with the door in the open position.

Any advice would be greatly appreciated.