Continues Problem with no after sales assistance from BMW

We made a huge mistake made in 2017 when we purchased a BMW X5 apart from having several pre-mature failures with air suspension, We have been struggling with fatigue cracks in the back rims. We have repaired the rims several times since the first few months after purchasing the vehicle and we have replaced the back rims/mags twice, yet we are still experiencing tyre burst after tyre burst when travelling distances of more than 100km. The cost of repairing and replacing rims have been exuberant, notwithstanding the high cost of having to replace tyres every time we travel long distances.

How is it that you buy a vehicle for transporting your family safely to required destinations and you not only have to pay for sub-standard manufacturing. This situation with the back Mags and Wheels have put the lives of our family in danger on a few occasions when travelling at night azand having a MAg/Rim problems. It has been a frustrating experience driving the X5 and it is definitely not what we had in mind when purchasing this vehicle.

How do we deal with this continued problem and why are we as customers required to pay for and compensate you fatigue failures that are a quality problem develop by BMW.