Air Bag Not Deploy problems of the 1999 Oldsmobile Silhouette

I recently purchased this van from a and b auto sales in bellaire ohio. What I thought was the seatbelt light , turned out to be the air bag light. The light has been on sense the day I bought the van and the dealership refuses to fix the problem. I was informed that this van never should of left the lot with that light on, it is considered a unsafe vechile and if I have an accident the airbags will not deploy. Dealership knew this and sold it to me anyway.

While turning, another car ran a red light and hit consumer on passenger's side of vehicle. Upon impact, rear door flew open, and airbags did not deploy. Consumer feels this is unsafe for anyone that may be riding in the back seat.

While driving 55 mph had a direct frontal impact, and driver/ passenger's air bags did not deploy which did not protect the occupants in this crash. Please provide further information.