BMW Service / Accountability Poor

I am disgusted by the service im receiving from BMW regarding my 2018 BMW X5 M50D. I have been a BMW fan for many years and we have 3 x BMWs

I feel like moving away due to the lack of skill, lack of attention, lack if accountability

My car was sent to BMW Fourways and BMW Midrand several times for the same coolant error, over the last several months, and every time they claimed from maintenance and told me its fixed.

It was NOT fixed.

I keep sending it back and being inconvenienced.

Now, the motorplan has expired in April 2023, and the error has been back but im told that they not sure what the issue is and they want to charge me R21 000 to strip the car to check. I declined this as i said its not my problem as they should have done this under motorplan. BMW then authorised them to do it.

Yesterday they came back saying they still cant find the error and they suspect its near the gasket, and to get to the gasket, without fixing the issue, just to strip to get to it, i need to pay R72 000.

Again i declined it, as its NOT my problem if they dont know what they doing.

Im going to fetch me car today and sell it, then never buy a BMW again unless you address my concerns and become a brand that is accountable for mistakes. !!!