Chauffeur door manual opening problem

Hello Friends, the driver's door of my Peugeot 307 was not opened manually, when I inserted the key, it turned neither right or left, I tightened the wd40. At this time, he started to freeze. What might be the cause of this problem?

Door flares need to change badly, forcing the thief or something that broke the flare or the children inserted other keys, you need to stop by the lockers.

How much do you think it will cost? Could there be a problem with encryption?

The last one was around 100 lira, but it was too late, the encryption of this price is resolved by the key unlocking keymaker, and if it is wasted, it means that it is corrupt.