Just doesn't make sense!

Yesterday we just wanted a milkshake and a ice cream for our 16mth old baby, we asked for a cone ice cream and asked if they could maybe just put it in a cup as it is for the baby, the guy did not respond, and when we finished to pay, we noticed that we were charged R13.90 for a ice cream cup and we said but we asked for a cone which is R5.90 but just to put the same amount of ice cream in a cup, he then said, this is after paying, that we must pay R9.00 for the cup, which we refused, he then refunded us, we again asked the lady doing the milkshakes if she could just put the ice cream in a cup, then she came back and said we have to pay R10.00 for a cup, we were shocked! Left it there, took our stuff and left. Next door where we ordered sushi, they provided us with a cup FOR FREE. And btw the milkshake was terrible, it was so sweet nobody wanted to finish it. Thanks for NOT being human and NOT understanding parenting.