I purchased a bmw x2 at the end of January, after ...

I purchased a bmw x2 at the end of January, after 2 months I got the message '' worn pads, take the car to the dealer '' on the car's computer. I bring the car and after leaving it 2 days, on the return I get the writing again. I call again and they tell me that it is a problem with the computer instead, given the lack of competence of the staff, taking it to another mechanic, it tells me that it was only the sensor behind the wheel. Conclusion I have a car that I pay dearly, new and just released in 2020, which is under warranty instead I found myself having to pay a mechanic for a trivial problem.