no customer service

I went to shoprite chekers with my grandson this afternoon. When i got to the till, one of the items i bought (2 part lunch tin) happened to have a bar-code and it was the last one they had. While they are attempting to help me, my 7 year old grandson needed to use the bathroom. I asked the cashier who then directed me to the security guard who refused to let the little boy use the toilet and told me he has to go out and use the public toilet. I tried to explain that I am still waiting for the bar code issue to be resolved and that it was not our fault that it was taking so long but they still refused. 10 minutes later one of the mangers/supervisors then came and asked someone to walk him to the staff bathroom. My anger and frustration is that this is a child and the reason we were still in the shop is because someone did not do their job as the item did not have a bar code. I really and truly demand an apology.