Mazda bad service

I bought my car 3 weeks ago and in the first week it gave me an issue with the brakes and I was told that Some cable wasn't clipped in properly and you as yourself how negligent they can be to not do a full 360 check because that would have caused danger to my life. Now at 3 weeks my headlights are not working and I am told that the car can only be booked in next week Monday. So I am not sure how I am supposed to travel with a car that is not roadworthy. Mazda has been pathetic in the 3 weeks that I have been with them. 0 after sales service whatsoever. I wish I had taken my business elsewhere.