Returning to stock...... Help plz

Hi all,

Need to return my s3 to stock, I've removed custom binary and flash count and flashed back to LE8 stock software, but messages app don't work and won't update through kies, I understand this may have something to do with the csc so I flashed a different one - got messages app working but still won't update so something must be wrong. It's on csc btu

Please help as I need to use the warranty, it's a uk phone purchased from carphonewarehouse unlocked and simfree