Can BMW sort this out once and for all...

I love my car and I love BMW Northcliff, BUT unfortunately of late neither is giving me peace of mind. My biggest gripe is my ongoing and repeated assertions that BMW have not managed to resolve my vehicles coolant leak. My vehicle (FY28XN GP) was last booked in for this issue 21 Jul 2022. And since receiving the vehicle back I’ve had to top up with a total 2.25 litres of coolant, of which 1.4 litres was added now 3 Sept 2022 after receiving a dashboard low coolant warning. This last loss of 1.4 litres was just within the month of August, meaning I can’t even get through a month without having to significantly top up the coolant. This is troubling. By now the receptionist must think I’m a complete nut job, in one sense I can almost detect the disbelief about my predicament. But I assure you it is not me it is the vehicle. Initially all BMW’s diagnostics never detected anything, then the leak was allegedly found and repaired, but I’m sorry to inform BMW that this is not the case and the vehicle is still losing a significant amount of coolant on an ongoing basis. This is causing me untold stress and loss of peace of mind. I’m even beginning to entertain the notion that BMW may be aware of where the leak is but that the labour cost in fixing the issue is prohibitive so I’m just forced to lump it – how else do I justify that this matter has never been properly resolved. Is this perhaps the issue at hand? Recently I received an SMS notification from BMW advising me to book my car in for an oil service. I have made a provisional booking for this Thursday (8 Sept – BMW to confirm). Besides the scheduled service can BMW please look again at: 1) the coolant loss issue, and 2) the fact that my front windscreen keeps on misting up and that white gas also flows out from the dashboard air and AC vents (perhaps the drain is blocked or the unit is freezing over). I really hope that we can put this coolant issue to rest once and for all.