Price Tags

I usually rather often go to Shoppers at Lundys lane after work as it remain open for 24 hrs. Convenient for me. Just a feed back its been now many times that the price tags on the products usually on sale items are not updated and many time i mean many times i have to tell the cashiet about this and the staff seemed to be least bothered about it. Its very bad that when as a customer i picked for example an item for 2 dollars and at counter the cashier told me no its not on sale . Last time the staff to hide their negligence said that one of the customers has exchanges the price tags very ignorant staff at night.