Disconnect the battery for an hour or two - then try to unlock with the key.
If it does not unlock then - you have found the source of the "stuck" door.
You will then need a "Slim Jim" tool to open the door manually and then you can get to the inside of the mechanism.
EITHER the linkage has (i) dislodged (ii) broken [jy kan een self maak met bloudraad]
You could try with a long thin screw driver .. Lift the door handle [outer one] - insert the screw driver into the opening on the left, manouvre it as flat to the inside as you can, feel around for the release and try push it to open the door.
Don't bring God down to your level of faith ... bring your faith up to His level!