Motoplan info not fully disclosed by Sales person- dishonesty

I bought a car from BMW Menlyn last year June and i asked the sales person if the car still has a motor plan and he said it does and i could see the papers that it still does, but the sales person didn't tell me if it will expire after couple of months. I told the sales person couple of times that i don't want to buy a car with no motor plan because it would make sense to buy such an expensive brand without it. next thing i got an email after 3 months saying motor plan is expiring i then call the sales person he then said i shouldn't worry i am covered up to 100 000 Km mind you i got the car when it was on 60 000km now i am 72 000km. Now i have a DriveTrain Error i took my car to BMW with confidence thinking i am covered boom i got the sad news, i am really disappointed at BMW because if i knew i wouldn't be covered was not gonna buy the car in the first place.