Car purchased with promise 6 – 8 weeks and will continue to be delayed

Hello friends, my brother ordered a car in the car dealership at the beginning of March. There it was 6-8 weeks. After the 8 weeks, my brother wanted to pick up the car and was then stopped again. There are delivery difficulties, he should still wait until June. At the end of June he asked again, nothing again. At the end of August it would be time. Now he has received mail, the car can only be picked up in November. We do not know what we should think about it, have you possibly calculated un d see if you get a cheaper new car somewhere or even an EU car. Must the car dealership in such a case then announce that it is an EU car and is it normal to be kept like that ??? I haven’t experienced such a thing yet, because when I got my new car, I just had to wait 6 weeks.