Ah, I really appreciate you came up with something. So, should i search and download this firmware *Which i don't know, where to download!* and are you sure this is the "Stock Firmware for my region?" And about the one i download, What about that? Thanks mate and Sorry for alot of question, Just want to make sure i download the right firmware so i am out of these trouble's.
Here is rom for Pakistan http://www.hotfile.com/dl/193299386/...1_PAK.zip.html its from sammobile and here is the guide how to flash it and unroot your device :
First u need to use triangle away here is the link for the app and the guide how to use it http://forum.xda-developers.com/show....php?t=1494114
Then u flash it via Odin here is the guide how to flash it and if u scroll a bit down on that guide u will find a download link for ODIN http://forum.xda-developers.com/show....php?t=1646610 remember use your region stock rom i linked u above instead of the rom in the guide the procedure is the same for every firmwire .
Edit: When u finish that u should boot into recovery and wipe data/factory reset and wipe cache , to boot in recovery mode all you have to do is shut down your device and boot while holding the volume up, home button and power button simultaneously then u will enter recovery mode.