Game Gateway staff disrespectful and unhelpful

With reference to my previous complaint about the cadac gas cylinder, I was asked by Shain to come into Game Gateway and collect one with a customer inconvenience voucher, Shain told me that he was off on the 23/06/2019 and he had left the item in his office for me and to speak the store manager or Siboniso Makhatini, or to have someone call him if I encountered any problems , I went to the store(around 2 pm) and asked for Siboniso and asked him about the item and the customer Inconvenience voucher ,he said he didn't know anything about it, I then asked for the store manager , Siboniso then tells me the the store manager had already left, so I then asked him to contact Shain to ask him , Siboniso tells me he doesn't know his cell number, I then asked Siboniso to go check Shains office for the item and check if he left any notes attached to the item, Siboniso tells me to go take one from the shelf, so I then asked him what about the inconvenience voucher, he tells me he doesn't know and walks away. Not willing to go the extra mile to help, guess it wasn't his problem, he didn't care. I was about to go back home as there's was no one to help. I passed the hi tec department and asked a salesman who was second in charge if there was no store manager, I was told the assistant store manager Darryl bethnil was in . I was shocked, he came , spoke to me ,called Shain and brought the item from Shains office, he resolved the matter in 5 minutes. I then asked Darryl to call Siboniso and ask him why he **** to me and didn't want to help. He would have preferred the customer leave the store unhappy, Siboniso came and insisted that I only asked for the store manager, who had gone home and I never asked for anyone else( does game hire stupid people), so I then asked him if you did not have Shains cell no, why didn't you ask the assistant store manager for it, still says he doesn't have Shains cell no. Siboniso then started to raise his voice and didn't let me speak , kept shouting that he had witnesses , probably all his Buddy friends to cover for him( I guess witnesses to show he didnt inform the customer about the next in charge of the store) , he was shouting and embarrassing us in front of other customer and staff , My wife and kids were present as well, even Darryl looked shocked at Siboniso. We couldnt talk to him anymore as he new he was wrong but still kept defending himself and with his shouting , we just pushed our trolley and walked away, and because of him I Also stated shouting and losing my temper, .Hope this in not how Game trains their staff with people s****, very disappointed in the people game hires .Guess if you dont have any answers for customers , just shout at them. Not once did he attempt to apologize. Because of staff like Siboniso ,Game will slowly stop becoming the peoples first choice for shopping, I know ,all my appliances were bought from game . like to see if Siboniso is disciplined for his behavior. The Store Manager should instruct staff to direct customers to the assistant store manager when he is not in. Very embarrassed and disappointed customer