I brought BMW 328i Xdrive car from this dealer wit...

I brought BMW 328i Xdrive car from this dealer with low miles 12k miles car. With in a year service is free. After 11 months, they did free oil service since it's a certified car. . That sucks me everything. Actually they haven't done servicing/oil change on 11th month because it's a free service. After 2 months (14th month) my car suddenly stopped while i'm driving. They repaired something, i got car. Once again after 2 months (16th month), engine light showed up. Now they are telling me that your car service is due, bla bla, because you haven't done any car service/oil service from last 1.5 years from the date which i brought. What.. they said they did it on 11th month. Actually they didn't do on 11th month. They are asking me to pay for all. And my car is frequently having issues. All sucks up. Frustrating. money waste. Finally i understand that i brought a big JUNK certified car with lots of money.