Missing item

I have ordered 2 items from Adidas online ,which is 1 tshirt n 1 short both Adidas. When delivery came, it was small box which I thought 2 items can fit ,for my surprise when I open the box was only 1 tshirt n short was missing which I don't understand why n this is not first time Adidas does this to me.i am nt happy at all