Rotten

So i went to Game stores in Soshanguve Crossing on the 30 of January 2019 and bought a Shox b boy speaker as a gift for my nephew. On the 31st he called and said the speaker does not have a 3.5mm aux cable/ mini usb charging cable. I called Game in Soshanguve and explained and i was told to come to the store. I then explained that i work far from Game stores and i would come when i get a chance. On the 17th of Feb I went to the store and the guy with dreadlocks told me they cant exchange nor replace the speaker for me as their cashiers check whats inside the box before a customer leaves the store but funny enough he himself didn't even know whats inside the box. I was told its being long and i could have taken out some of the items out myself then come to the store and claim i didn't find them. But the slip states otherwise. If i read carefully it said 21days. Now here is a guy with dreads giving me an attitude and accusing me of *****ing something i bought. And its not the first time i have such encounters with Game at soshanguve crossing last year it was something different but the incompetency of the staff seems to be beyond repair. would i take my time and come to the store if i had the guts to ***** from myself?