they ran me to rags getting my codes and gave me the wrong codes now they changed their policy
and wont give em to me again
I just received my unlock code which didn't worked. I contacted support through the chat option and asked for my unfreeze code. Once I got and entered that new code my device unlocked. Give that a try.
thats what i did on my first s8 the unfreeze code was the unlock code they had em backwords But samsung replaced my device same imei and all but none of those codes no longer work which technicly they should as the new device was programed with the same imei and cert file that samsung uses to sign their imeis