Unavailability of Marketed Items

I've just left the store. I was looking for a particular item which is out of stock from the PEP store I bought from. I checked the internet first and the availability was at two stores according to my search so I went to Sandridge first...the lady makes an effort to check they did not have stock.So I checked the Internet again before departing to blue hill PEP only to be told they do t have stock there too ...without even checking their system....I guess they know their stock...but why is the internet search giving me hope and I had to drive to these places only to be told the product is sold out. Even now it shows as available in Centurion and other PEP stores. Can PEP HQ please upgrade the system. Thank you