BMW fraudulent activity

I bought an X5M with license plate JPZ 846 MP in 2018 brand new out of the box from Leo Haese BMW in Centurion. For 3 years now we have never changed brake disks, only brake pads. In November 2021 they changed the brake disks @ 52560km. We experienced a very bad screeching sound straight after the disk and pad changes and when I spoke to the technician at BMW he simply told me that the brake pads compounds are differing some hard soft extremely soft etc. that they receive from the supplier. I accepted this as I am not technical. I took it as the answer, we don’t drive the vehicle much and when we did this screeching continued and went away the whole time coming and going. A coupe of months later it became unbearable, and we took it back in Feb 2022 @59261km they replaced the rear disks only a couple of km later @59421km they replaced front disks as screeching continued. A few months later in June 2022 @64938km we took it back only 4000km later with the exact same screeching that we hoped would have gone away, my wife drove and accepted it as the norm. They looked and said brake disks and pads need replacement again both front and back which means their workmanship was sub standard and they put in secondhand disks etc. and thy probably took the new ones and sold it underhand and now refuse to do it under motorplan as they say it’s customer abuse!!! My tracker reports show zero harsh braking, so how can BMW argue against a tracking report? And my wife drives it only? For 3 years all is ok, they change the stuff and now all of a sudden we are abusing the car, my wife drives it if it’s been driven. I have tracker satellite tracking in all of my 15 vehicles. 10 of these vehicles fall part of my fleet and harsh braking is easily detected by tracker. I have the report for my X5M vehicle and not one harsh brake took place for the period. Your technicians here at Eastview BMW Emalahleni in South Africa made a mistake and don’t want to own up to it else they need to pay. I have purchased 4 M models from BMW so far and a total of 10 BMW’s. Why would I be the abuser now? 3 years clean and now within 6 months all disks and pads replaced???