Incorrect Adverti*****t

I went to Bakenkop Spar 19/02/2015 to buy Formula milk for my 7 month old daughter. On arrival to the baby isle I saw NAN PELARGON on special for R169.99. I took NAN PELARGON 2 approach the counter and when they rang the item it rang up a R249.99. I told them this is not the correct price as the adverti*****t state R169.99. The then call them manager on duty and he said that the special is only for NAN PELARGON 1 and not for no 2 and 3. I told him but your adverti*****t does not state whether it is for no 1 only and he said that the price was on the incorrect shelf. I then showed him that on all the shelves there are different NAN product. He then said to his staff but all the other the price for 1, 2 and 3 are the same and do not know why this price differ. He then looked at the expiry date and said that only no 1 is close to expiry date and it is only no 1 that is on special and I will not get the special price on no 2. I took photos of the adverti*****t. When we went back to Bakenkop Spar the following day they have written on the adverti*****t that the special is only for no 1.