Broken DS

I bought my brother a DS for his birthday on December 4, and already his L-button hardly works. He has to press it really hard for it to register. About two weeks ago, my R-button started having this problem. At first I just had to press a little harder than usual, but very quickly it got so bad that now I can hardly use the R-button at all. Then, last night, my hinge cracked. It makes me very sad.