The automatic inflation of airbags in the car during an accident shall be only when the vehicle has an impact while head on collusion.
Technically, when the vehicle tumbles or rolls over during this type of accident, the airbags may not inflate automatically, however this technical details may be confirmed through motor mechanic engineers.
If you feel that you have been cheated by the company due to this technical defect (?), then you may get an opinion from an expert in this regard and first serve a legal notice claiming relief and compensation to the company through the dealer from whom you purchased this vehicle and after that you can drag those people to consumer forum for redressing your grievance.