A very displeased customer - BMW Westrand

I had my brake pads replaced toward the end of last year, and then additional brake work was done again in January. Since then, I have not been happy with my vehicle at all. Every time I reverse, the brakes make a horrible screeching sound. I have taken the car back to the dealership multiple times, and each time I am told that they have tested it and “cannot hear anything.” I was even asked to record a video of the sound while driving, which I did. Despite providing this evidence, I am now being told that nothing further will be done because they still “cannot hear the screeching.” This response is completely unacceptable. I am extremely dissatisfied with the service I am receiving from BMW Westrand. I am paying a significant amount for this vehicle, and it is unacceptable to be driving a car that screeches every time I reverse.