UK Car Repair Questions? Ask a Mechanic for Answers ASAP
It sounds like you may have confused the microswitch- I would start out by disconnecting the battery, setting all the doors to lock, and then touching and holding both battery cables together for about a minute to reset all modules. Reconnect the battery, and try unlocking the door again and see if it works.
If not, then I would advise replacing the driver door latch, as the miscroswitch may have actually gotten broken in your maneuver- they are tiny and while not fragile, yours has a few years on it.
roll the windows down before you lock the doors.