IPhone 5c screen popped out on the corner?

My iPhone 5c screen popped out on the top right corner. I'm not sure when this happened as it was in a protective case, I only noticed it earlier this week when I took it out to clean the screen. I took it to my carrier and they said I would need to contact apple, which I did and then had to mail my phone to apple as there's no store within a 200 mile radius (yay for living in the sticks!) Anyway, when I checked the status it said "Apple was not able to duplicate the issue, the original product was shipped." So, did they fix the screen? I didn't think they would try to 'duplicate the problem' and the rep I talked to said it should be an issue covered by the warranty. I'm just wondering if anyone has had a similar problem and what happened.

I think you should contact customer care