Default [Q] Rooted samsung T217a galaxy tab 3.7.0 4g lte stuck in bootloop please HELP

Hi I am a noob to droids and I rooted my tab and all was well at first. I knew that I could not put a custom rom on it or get a custom recovery however I thought I would be able to install a theme on it. After I installed it it said to reboot and I did and It was getting stuck on the atnt logo. I tried going into recovery mode and doing a factory reset and still the same result. I heard that odin can restore samsung devices I just dont know how to get the firmware for my tablet I looked everywhere and what to do. If someone could please help me it would be most appreciated the device was on jellybean 4.2.1 I believe.