Shops over charge and not that trustworthy. I would suggest going to incredebulous (veteran PG member) to get your firmware updated.
http://www.pakgamers.com/forums/services-perpetual-deals/19958-xbox-360-wii-psp-repair-modify-liteon-spoofing-flashing-karachi.html
http://www.pakgamers.com/forums/services-perpetual-deals/19958-xbox-360-wii-psp-repair-modify-liteon-spoofing-flashing-karachi.html