door locked on passenger side

Mine has just gon on the passenger side, but this time i cannot unlock the door,it looks like by the door sil that it is trying to open as it does raise but then lowers slightly. It has done it before but only for a few secs, The driver side is fine, Can someone tell me how do I open the door or have I got to take the panel off from the inside to get the thing unlocked. please help.

try pulling up on the metal pin on the door whilst locking/unlocking.

Once you’ve got the door open, you need to lubricate the mechanism. its easy to get to once the door is open. On the lock edge of the door remove the rubber circular bung and the reflector. You will see a lever, ths is what seizes. You need to wiggle it up and down. You will see the door lock and unlock. You need to put something like white lithium greese on it.

This is what sorted mine.