Pathetic Customer Service

I was assigned a raincheque by the Southgate branch of this retailer dated 02/09/2018 for a special on Dinu Toilet Paper, 2 for R150 as it was out of stock on that particular date. When I received a telephone call over a week thereafter to make a collection I went in the next day and discovered that the same story app**** whereupon I went to the store the following week after that to check and still... I was assisted by one of the shop assistants who was called by her colleagues at the counter in the corner behind the tills for baskets who spoke to the merchandiser for the items and told me to return on that Sunday as thereupon would be available stock, I was informed to come straight to the corner as they would save the items on my behalf. Well, that Sunday came and went and still... This morning I made an umpteenth check on the items and gladly found them on the shelf until I tried paying for them using the raincheque in question. The cashier who served me promptly called her supervisor who promptly called a lady named "Lorrain" who made it clear that my raincheque is expired and "I must identify the culprit who told me to come in her and get these items,''. How unprofessional! This is not the attitude that I expect from a retailer. I am not sure what business of mine it is to name and shame the assistants for doing their job. My impression is that Lorraine refuses to take responsibility for the fact that the store is inconsistent in stocking its items and shifts the blame unto me a customer for expecting the service that I pay for. Suffice to say when she denied ever knowing anyone who helped me and brought a cashier who did not recognise me I walked out of that shop absolutely insulted by Lorraine's discourteous and unprofessional attitude. This is not the service that I expect from Pick 'n Pay and yet somehow I am not surprised at all because when I arrived at the shop I noticed how there was nobody at the parcels counter instead there was a group of three cashiers in front of it standing around chatting nonchalantly. When I walked out of the store there was still nobody manning the said counter, us customers were enjoying a self-help service where someone is being paid. I am appalled by the shameless customer service and next time I shall stick to Maponya Mall and Diepkloof Square which afford better customer service that this!