I love BMW but have been very disappointed with th...

I love BMW but have been very disappointed with the recent service at the Meriam location. I just changed 4 tires in Nov/Dec 2017, we have driven for 8000 miles and now just taken the car for normal maintenance and was told that we need to replace the two front tires since the alignment is off (due to front tires are slightly cupped) is off which causes a rotational thumping noise. My concern is that when the replaced the 4 tires, they did not do good job at alignment and now causing this problem and causes the consumer more money. They want $1100 for the 2 front tires with alignment. They blamed it on us driving and caused the misalignment. This is a BMW X6. Very disappointment now.