NISSAN airbag didn't deploy

6 weeks ago I was involved an accident which is a write off. Wearing seat belt, my airbag didn't deploy. Customer service was incredibly bad when I asked for an investigation. After endless calls to the call centre I didn't even get access to the full technical report explaining why the airbag didn't go off. I DEFINITELY am not buying a Nissan again. TALK ABOUT alienating your customers.