Prices not on shelves and refusal to scan barcode

I wanted to buy a pin up board and there was not prices on the shelves. When i took two different boards and stood in the row to pay but first wanted the price differences between the two, the lady at the till just saud that they dont check prices i must go to customer service. After standing in the row, i put the boards back and left. Firstly the prices are not on the shelves for all the different pin up boards available and then the cashier at the tills refuse to check the prices. I wanted to buy one but i would rather go to another place that will help you at the cashier. Bad attitude!!!!