Cheating on the name of Security Features

I am having Swift Dzire Top Model with all the safety features; a month ago I met a fatal accident on national highway.

my vehicle roll four to five time on road and jumped on road side, I was wearing seat belt then I nearly survived, my all the safety features like air bag, abs it didn't worked. When I call to company people their very surprising reply I received that the accident was not happened in that conditions where these feature works.

All though they trying to convince me through their service manual. In service manual also mentioned that these features has to be work, in which condition my accident happened.

Most disappointing that I wrote a mail to company on very next day of the accident, till date company is not bother to response me. This is worst response from a largest automobile company. Fake information, poor safety feature and very poor response. So please before buy a Maruti vehicle think a lot about safety and security. And be ready to receive a very pathetic response from Nations No. Car Company.