BMW poor quality car and lying about warrantee

I bought a 2015 BMW 218 Active tourer in 2016. When I bought it the sales person told me the cover I receive with regards to maintenance included a 5 year motor plant that covered everything, I just have to put in petrol and change the tyres. During a drive in the rain I noticed the ceiling getting wet and the water dripping on the centre console. I took the car to my nearest BMW dealership. The service manager told me that BMW only covers rubbers and cosmetics for 2 years, thus this damage windshield beading is not covered anymore since the 2years warrantee has elapsed in September 2017. I mean the car is leaking water into the roof!…. This is not cosmetic, this is a serious problem. It can cause rotting of the ceiling, electrical damage, and malfunction of several equipment. This just show the poor quality cars BMW sell for an enormous price. I have driven several older cars Toyota VW and Opel, all of the cheaper and older, and never have I had a roof leak! This is absolutely shameful quality and service from BMW. I was never informed about only a 2 year warrantee on rubbers when I bought the car, just about the 5 year all-inclusive maintenance plan. I bought the car on a guaranteed future buyback with the idea of buying another BM when the time has elapsed, what a joke. I will NEVER buy such a poor quality brand car again (not even speaking about the poor service and being **** to). I am truly disgusted in BMW, I cannot even express my disappointment and feeling of betrayal.