PnP goes out of their way to cheat you

I am a frequent customer at PnP Irene Village Mall , I go 2 or more times every week . First thing I do is go check my discounts on my smart shopper card . And everytime I see I have R7,40 off 7KG potatoes , I anticipate a fight .I am fed up with this way I am cheated and dealt with . The most recent incident involved a clever wording scheme by PnP and this is done on purpose to cheat you out . And if you don't keep your slip from the smart shopper terminal , good luck getting your discount . So today's attitude was that I can't get my discount because I am buying PNP no name potatoes 7KG and not the stated PNP potatoes 7KG . They argued with me that their is a difference , so I asked them to get the correct product then and no one could . I am a regular shopper and KNOW that this is the only brand at Irene . I was dealt with as if I was dumb , your supervisor , Aldah ,was reluctant to hear my part of the story and just continued to argue with me and managment was to lazy to come and see me , but ironically as I started taking pictures everything changed and they immediately came to see me . 30 minutes of arguing and I finally got my ADVERTISED AND PROMISED discount . I know 7,40 rand is not alot of money , but when it happens to multiple people who trust pick and pay to honour their discounts , it adds up to alot of money they are *********** . I am sure I speak on behalf of many and many South Africans whom are fed up with PnP ripping people off . I will make my voice heard should this complaint not be addressed or resolved . We are tired of your tricks PnP !!!