You should have just read my post then and go to the ota download link and install it that way.
LINK TO THAT POST HERE
And to be clear the download never actually downloads? OR you mean it downloads, but stops so far during install, restarts, then tells you it was interrupted? Need to know which it is. My apologies ahead if you have previously stated.
Its the actual at&t 4.4 kitkat OTA update extracted from my Mega after download. Just make sure you read the thread and understand it will lock you down harder because of knox kernel etc.
Could've saved going to the store and instead flashed official stock mr2 tar.md5 in odin and fixed it that way. File is in my signature under mega repository.. Thats why I dont like using kies for stuff like that. It works for some but not all and has a tendency to do just that.
If you want the new update best way since you already have a clean device I would do just that, flash the mr2.tar.md5 in odin with auto reboot unchecked. Once finished load the device into recovery and grab the ota update from my thread and install it via sideload.