I can't open either of the passengers side doors.

I have no remote for the car and the only door with a lock is the tailgate.

The car was locked yesterday by pushing the botton down on the drivers door, this locked all the doors apart from the boot which was locked with a key.

I unlocked the car this morning by unlocking the boot, climbing throu to unlock the drivers side rear door then the drivers door.
I've fitted a lock to the drivers door now but that will only lock/unlock the drivers door.

How do I get the passengers side doors to open ?????

The disc cutter is ready if all else fails.