Buy anything but cars from We Buy Cars

The only thing that is right in the company is the salesman. Currently purchased a bmw 420 from the dealership, the vehicle was great just one dent here but I was happy. The salesman told me that the vehicle would go for the major service and I’ll get the car in order. Took the car home and a month later the vehicle starts leaking oil. I call everyone who was involved with the purchase process get sent from pillar to post. I get told by the warranty company to take the vehicle to an RMI approved workshop and they will cover the cost. I took it to Bmw and they say they don’t cover oil leaks all of a sudden then I took it to another RMI workshop and I thought they would cover the cost then I get told that they won’t cover the cost again so I pay for the repairs that needs to be done to the vehicle. I was then told that they will not reimburse me for any of the costs involved. Why did they take the vehicle for a major service then a month later it leaks oil, it shows that their dekra reports aren’t true and they cut service costs