Arduino doesnt work - pls help

I damaged both 328P and 8U2 bootloaders on my Arduino when I accidentally unplug USB cable when I was uploading a program into my Arduino.
It looks like I successfully reuploaded bootloader into 328 but I cant still reupload 8U2. I dont know what to do with it now.
Please, can somebody help me?
Any help will be appreciate.

Thank you for reply johwasser. My PC cant detect Arduino, no sound is played when I connect Arduino to PC. I cant use Flip to upload hex into 8U2... I soldered another ICSP pins (close to 8U2) to my Arduino and I tried to upload hex through it but unsuccessfull.