Blackberry passport problem please help

Hi All basically my blackberry passport will not connect to wifi any more, it has also stopped showing my contacts, its just a black screen when i click on the contacts, all the messages in my hub just show normal numbers now, ive tried restarting it but no joy, ive put a sd card into it but it wont download the driver its saying error, im guessing my phone has got a software issue and may need a factory reset. annoying, any ideas as its a fairly new phone and cost me �250 losing faith in blackberry now

Reload os via BlackBerry link or run autoloader.