Tata Motors — Air bags not opened during major accident.

I am using Tata Motors Tigor XZ+ car and unfortunately I met with a major accident few days back and one car hit my car from front. I and my wife were in the car and we both were wearing seat belts during this accident and even after this the airbags didn't open. I didn't expect this type of safety failure from Tata Motors. I myself purchased 3 cars and also insisted so many to go with Tata Motors but after this I am losing confidence in TATA. The seat belts were not opened during accident may be due to manufacturing defect. Hope Tata Motors will go through this issue.