i have an issue with macs screen i already repaired it twice in a week . Do i get a replacement

I have a mac air retina 13 . which I bought 6 months back. I have a screen issue. So I took it to the nearby apple store for repair. The day after I brought it back ,it is having the same issue again with the screen blacking out. Can I get a replacement or should I be getting the repair again?

It's not even a year.