Unfairness at Game store

On the 24th of June I bought storage containers at Game store Trade root mall in Lenisa . Yesterday when I was using one of the containers I realized that it doesn't have a handle. Today I went to the store and I met Mr Mkhize at the entrance and he said I must bring the containers back. I then asked how possible is that I can bring both containers back for one handle , that means I must have transport in order to show them that I need the handle . Mr Mkhizes argument was how sure will he be that the other container doesn't need a handle and my argument was how can I travel from ennerdale to trade root just to lie about one handle . He then checked my slip to verify my purchase date ; he then said I must join the queue then go speak to someone in customer service or go back home and fatch the containers