Rude managers no Customer care

I have been to game gateway a month back Were I experienced absolutely terrible behavior from management. Beeno dog biscuits was priced incorrectly as well as the large Kellogg's rice crispies.I did bring it to the staffs attention I want the item for the price wen I I got to the till manager on duty Peter refused to give me another two boxes of each product advised a that once I am at the till I can't. A week later requested to speak to someone higher than him an I was given to speak to zubear who is higher than him. I have requested a callback which zubear did contact me advised him on wat had happened at the store hr advised me I must come in and will give me the items for the price.i have been to the store on the 30/07/2018 as notified him I will be there zubear was gone home off sick I then called him advised I am at the store an he advised me speak to Peter when I'm at the till so I did that after the supervisor on duty called him he advised he can only give me one item for the price I saw.I asked the supervisor to call him back he never answered I tried calling him back no answer. There was also a manager on duty by the name of Gloria dam rude not fit to be a manager. People like this who don't have Customer service should not be working at a store.customer care switch board including managers don't answer u can wait for ever on the line no answer I hope I get a positive feedback regarding my query at game gateway.