Default [Q] Help! Post-Root problems

Hey all, I recently tired to root my SGH-i537 att active but ran into problems afterwards. After I rooted I would boot up my phone with a unlock icon, not a big problem, but i was getting security notices an was unable to even slide the wi-fi search to on let alone connect to one. Another problem i ran into was my kernel was destroying my battery! i would charge for 6 hours and only go up to 70% ot have it die in an hour. After all that frustration i unrooted using the SuperSU unroot button. While I am now unrooted(i think) my battery is still dying insanely quickly, I cannot even attempt to connect to wi-fi, and i am still booting up with the unlocked icon. At this point I just want to wipe it and start new but when i did a factory reset all of the problems listed above were still occurring. Should I find a stock ROM and try and have that downloaded on? I have no clue what to do and i need help please D:.