Loose screen iPhone 5c screen?

I bought an iPhone 5c for my birthday back in November and in December, that phone had a small give to it on the left hand side. I went to the T-Mobile store and they replaced it. Now, not even a month with this new phone, it has a loose screen and it's pretty noticeable. The replacement phone I was sent was completely new. I just was wondering how I should proceed. Should I go complain? Any answers will be helpful!

If it's totally different yes if it's a different color no