OK, so I re-downloaded the following file:
and followed the instructions from:
Make sure you take a backup via Kies if you need personal files
Download the respective stock ROMS from sammobile.com or samsung-updates.com or see thread on Stock Roms on XDA
Extract zip to get tar.md5
Put device into download mode (Vol down+ Home + Power) and Flash using Odin (PDA option)
Wait till device reboots back into Android after completing the flash and recovery
Once device reboots, do a Factory Reset via Settings > Accounts
Once device reboots after Factory Reset/recovery, enter the google account info and restore settings and then turn off the device
Boot device back into download mode (Vol down+ Home + Power)
Re-flash the same downloaded firmware for a second time via Odin
Once the device reboots after the 2nd flash, your CSC should have changed to the CSC of the ROM you downloaded, and Kies also should show that CSC has changed and it should allow future updates via Kies or OTA
And my CSC still says OXA which I think is "open europe" (same as before) and OTA updates are still not available.
Can someone with knowledge of this please help?