Sales person cannot identify bs6 or bs4 car

The buying experience of this car is good but cannot be equal to maruthi, the riding is superb, when looks is concerned it's good compared to other cars like celerio, waganor, etc, servicing and maintenance if lesser than maruthi I think,, but one issue is that the sales person in Hyundai don't know anything about bs4 and bs6 vehicle, I had purchased this car in Feb and when I asked about bs 6 display the sales person said it will be displayed in RC card and I made payment for bs6 Santro and if the see the RVC card nothing is mentioned regarding bs6, so friend be careful when purchasing a new car