Phone [Q] S3 Stuck on samsung logo after attempted update to 4.3

I have an unrooted Samsung S3, i just received yesterday the notification of the jelly bean 4.3 update (originally ran on 4.1.2) so i went for it OTA via wifi, long story short, after download was finished and the phone automatically rebooted itself, it got stuck on samsung logo, i have waited for hours beside it (since i have modest experience about this) and finally nothing happened, so i started researching the issue, i have tried wipe data/factory resetting (didn't work) along with wipe cache partition, and no use, i have tried kies emergency firmware upgrade and initialization, but it can't see the phone in Download mode, i tried flashing the phone with Odin307 but it also cannot see my phone in Download mode, and i have heard that if the phones usb debugging was active, the phone would be seen, but i never used it, my phone was stock all the way, please help me get my phone working again.