Pathetic shopping experience

On the 5th of January I went to buy some groceries at Pick n Pay Bellville, as I was picking up items at the shelf I came across Addis containers click n seal with the price below stated R59, 99 and it was written on the price tag "on promotion" I got interested and I took it, when I was paying the cashier told me it's R299 and I even brought the price tag to show them, so they called the store manager who came to me and He told me he will not authorize the price because what was on the price tag is not for that product and that maybe customers or one of the staff who put it in the wrong place but surprisingly it was not the only one there, after I took that one there was another one left so the matter of fact the manager refused to give me the item with the price that was on the shelve. So I Ieft the store unhappy as now the manager was talking and treated me as if I did something wrong by picking up the item and wanted to pay the price that I saw on the shelve. I then contacted the customer care telling them the story and they logged the case with reference number *** where I was told that the regional manager will contact me however there is no turnaround time for my complaint, it depends with complaints they have. Until today there is no resolution as yet that is why I decided to write to you as I felt so ambarassed the manner the manager handled it as he was arguing with me. My contact number *** Thank you Noxxy