Releasing a vehicle with a fault

Yesterday I took in my 2010 VW Polo 1.6 Trendline for an airbag recall from TAKATA(TAKATA airbag campaign on your VOLKSWAGEN Polo Vivo),by the car is owned by me from brand new. The service history was at VW and then latter years privately done. The car went with the airbag light on and came out with the airbag light on. When I enquired it is the passenger igniter on airbag. Now this was told to me when the job is complete and car is ready. I am not a technician and thought the reason for airbag being on was because of airbag recall. The least Volkswagen(Constantia Kloof Dealership in Gauteng) could have done was phone me while actual work of recalling is going on and ask if I would like igniter switch replaced. Really disappointed Volkswagen doesn't know how reward loyal owners who drive their brand for years, one has to question their ethical and moral standards. NB.I wasnt given any invoice even if no charge.