2007 Nissan Versa Air Bags

I PURCHASED A 2007 NISSAN VERSA IN JULY OF 2006; 3 WEEKS LATER THE PASSENGER SIDE AIR BAG COVER CAME OFF THE DASHBOARD. TOOK IT TO THE DEALER SHIP AND THEY PUSHED IT BACK IN AND ORDER A NEW ONE. THEY SAID IT WASN'T A SAFETY CONCERN. THEY NEW BACK TOOK ABOUT 2 MONTHS TO ARRIVE. THEY REPLACED IT AND A BOUT A WEEK LATER THE AIR BAG COVER CAME OFF THE DASH BOARD AGAIN. WENT BACK TO THE DEALER SHIP AND THEY KEPT IT FOR A 2 DAYS AND THEY TOLD ME THEY HAD SCREWED/ BOLTED DOWN THE AIR BAG TO THE INSIDE OF THE DASH BOARD. LAST WEEK I CALLED THEM BECAUSE THE COVER CAME OFF ONCE AGAIN AND THEY CALLED A FIELD ENGINEER TO COME TAKE A LOOK AT THE CAR, MEANWHILE THEY SAY IS SAFE TO DRIVE THE CAR LIKE IT IS RIGHT NOW. SHOULD I BE CONCERNED OF THE AIR BAG COVER EXPOSED LIKE IT IS? SENSE THIS IS THE 3RD TIME AM REALLY CONCERNED ABOUT THE SAFETY OF MY FAMILY IN CASE THE BAG DEPLOYS. *JB