Bootloader unlock allowed:no solution Xperia V

hi, i was wondering if there's a solution found in changing the status of Bootloader unlock allowed:NO to YES. i went to the sony service center yesterday and start asking if they could change the status or even unlock the bootloader but they didn't know what the heck I'm saying, they even don't know the what is a bootloader. Even my provider doesn't know how to unlock it. everyday im scouring the forum to find a solution but to no avail. I want to flash the cm build but i can't since the restriction. any help and guides will be appreciated.

thanks