Gobi - Ultra long-distance glider

Today I bought two gliders, the boxes are very light in weight because the gliders are made out of polystirene. I only noticed on my way home that the one box was empty. I stay about 20km out of Carletonville, that is why I did not return to the shop immediately. I am really upset that empty boxes are put out on the shelves and would kindly like to get a refund for the one empty box.