Brakes Failed problems of the 2015 BMW 328

This is a brand new vehicle lease BMW 2015 328xi , for my wife - we just picked it up on 10/31/14, the brakes failed to respond!!!!!!! my wife was driving with my daughter and the car would not stop with her firmly pressing on the brakes approaching a busy intersection!!!! she finally got it to stop after shifting it into park. Extremely dangerous!!! they should replace this new vehicle for us immediately with another one of equal or higher value that we can hopefully trust assembled properly in germany. This BMW dealer never told us he was getting us one from south africa. Now, BMW of can't figure out what the problem is!! the vehicle must have reliable brakes. All the dealer has to say so far is he can't find the problem and is calling the main office to have someone take a look. We don't want to become a statistic because they are too incompetent to find the problem. Please recall it and protect us so we can get another car!!!! I expect BMW and the ntsa to address this urgent very serious matter immediately. Thank you. It will not be acceptable for them to return this death trap vehicle to us after some guy at the dealership or visiting the dealer from the main office says he can't find anything in such a highly complex vehicle. If the issue is not completely found and remedied the vehicle will have to be replaced. We only had it for a week and only got to drive it in the area a few times until this. It's been back at BMW dealer since Saturday 11/8/14. They picked it up on a flatbed truck. The ntsa should recall it for brake failure!!!!!!!!!!! after looking up BMW brake failure I now see reports from you on the recall of 2012-2014 BMW's for break failure!!!!!! the problem seems to be continuing in 2015 and they are not admitting it!!!!.