so i decided to buy a new battery today since my old one was almost dead, the genius manager at autozone insisted to install it for me (even thought they are not allowed to do so) so in an effort to save time i allowed him to do it, that moron put the battery upside down and put the connectors on the wrong ends (+ with - and - with +)

i saw a spark and i told him it was the wrong way, he changed it around and my door ding goes on and my headlights go on but now my alternator is fried! ARGH! i get it over to the gas station next door and pay 300$ for a new alternator installed and i tried to get the idiot to pay up but he refuses so I'm now taking actions through his autozone officials for this morons failure to realize hes not allowed to touch my car and that he said I MADE him do it.
so anywho, after my car was fixed and running i notice my airbag sensor is going off and my audio controller does not turn on, the mechanic told me it was a fuse within the control that might have burnt out is this true? and where can i go to get the airbag code deleted? will the dealership do it for me?
and also, is it the batterys fault for being on backwards that fried the car? or something else that could have occurred?
thanks!