Need official stock firmware download for my At&T SM-T217A Tab3 7.0

I've been trying and searching for the kitkat 4.4.2 stock firmware for my Tablet I love that tablet it was good for video streaming and good on storage.I sadly got stuck in recovery mode while it was receiving a update via OTA because my Internet flaked out on me. Talk about bad luck, and too make it even more bad luck Samsung has the ability to flash the stock rom but they say unfortunately because my warranty has expired they can't help me and AT&T hasn't released it yet that I've seen in my quest for the mysterious kitkat rom search.. OMG can anyone help me with my mysterious Search for the missing stock rom.. LoL

 

They said they would be willing if I was still with AT&T but since I'm not that they wouldn't because it was a error that happened when I was still with AT&T. I tried Evey reasoning with them with no luck at all.