Would really love some help my phone is buggered!

view story

http://forums.androidcentral.com – Right i will try and get as much info in as i can I have a Samsung Galaxy s3 on vodafone GT-i9300, and am flashing using heimdall on a mac with lion. I have bricked my phone initially trying to unroot from a rooted version of 4.1.2. I tried to flash an incorrect rom, one that was three network. This would not boot. So i then tried to re flash the rooted firmware thinking this would restore it to working order, however same issue. Eventually got this one to work but the ROM is all broken (so top bar, no google maps, wifi not working) and more. Tried flashing a version that is speci (HowTos)