I purchased a 2014 Nissan Altima back in Nov 2014,...

I purchased a 2014 Nissan Altima back in Nov 2014, the car had 3,000 miles on it when i bought it. This January the car started making a popping noise on the front driver side while driving. Since January 2016, til now the car has been in their service 4 times for the problem, and now in June , the problem is still not fix. I am currently under warrant since i have less than 36,000 miles, but it will end soon and still my car is not fixed. They have not offered to replace the car or put me in a new car or give me my money back. I am very displeased with this experience.