Default Any Tar roms? No way of accessing USB

Hey guys,

Searching for any rom that's tar so i can flash in download mode.

I cannot even turn off my P7500 P4 (just reboots when I try) and I cannot enter USB in recovery mode so I cannot drag roms into internal storage.

edit: After stressing so much, I can't believe samfirmware.com worked in my favour
http://dl2.sammobile.com/JF9cQ1kwMSM...ODTKH1_OPP.zip