Misleading Advertising

As I am an IT professional I do not have time to go to walk around in shops to do window shopping, I do research on prices on the internet and when I find the best price for the product I want, I go to the shop and buy what I have researched. Pick n Pay online shopping advertise Vodka (for a group of friends going to a game farm next week with the closest shop being 2 hours away) at a reduced price per case. I checked their price, went to the shop to get this price. I was subsequently told by the manager of the Cresta branch that he would give me the advertised price and would be back shortly. When he came back to me he then said that he had spoken to the call centre and those prices are ONLY for online shopping. I was confused as nowhere does the site clearly state that these prices are not in-store prices. After giving my business to someone else, I phoned the call centre myself where I was told that the online prices are for Pick n Pay Woodmead if you are not logged in. When asking where that is stated on the site, the agent referred me to the Terms and Conditions. BAD FORM Pick n Pay. Hiding behind the small print is the ***ardly way out. You have lost me as a customer forever!