Aeropostale skirt and top

I bought this outfit because it was really cute but it was just simply too big in the top area it is a matching set it’s a size extra small I weigh about 105 but it did not fit my chest area. I tried on the skirt a few times to try and wear it with another top but it didn’t work. The top still does have the tag on it :) If you have anymore questions just let me know