[mcsport]

Welcome to the Forum Raysy

I think you need to unbolt and remove the Passenger Seat for better access. Probably a couple of Electrical Plugs for Airbag/Tensioner
I have had the Door Card off and Window Mech out. Not too bad.
Think there is one Screw for the Door Card inside the Door Shut that you cant get to.

Workshop Manual on my OneDrive

Kia Cee'd Ceed (ED) 2006 - 2012 Factory Workshop Service Repair Manual.pdf

PDF File

1drv.ms

An Auto-locksmith may be able to open and cheaper in the long run

 

[mcsport]

Thanks for the manual and trying to help.
My son's mate is an auto locksmith, and told me that when the mechanism goes, it's time for violence.
I took the pass seat out, managed to get the door card off.
I then took my angle grinder to the internal metal door skin, cut a window in it, then with a hammer and chisel smashed the lock mech up. Eventually got to the bare latch, and managed to operate it with a long screwdriver, and finally got the door open. Got a replacement lock unit from Ebay. All fitted and working again. Happy ending.

Thanks again for the help

Good the hear you got it sorted. Sounds a bit of a Job.
Thanks for reporting back. Always useful to know.