Default [Q] Samsung Galaxy s III US Cellular Firmware problem

I have a major problem. My Samsung Galaxy s III US cellular is stuck at a menu everytime I start it up. It says Firmware upgrade encountered an issue, Please select recovery mode in kies and try again. This hapend because I downloaded a an odin program and tried to downgrade my Phone from 4.3 to 4.1.1. Of course it failed and that is what happened. The next thing I tried to do was go into recovery mode but Kies 3 doesn't support my phone or it wont connect to it? Please I need help, any help will be so well appreciated and thanks to all the future help!