Customer IS NOT right?? False advertising

The Customer isn't always right? I shop at Starwood Super Spar on a very regular basis, monthly and the lunchbox convenience from their deli. Here's the catch, it's month end, I buy the list of items but opt for their promotions instore as its cost effective. Only for seeing an item at R42, the cashier scans with rewards card with the item being at R62 - that's the full price. Nevertheless, I didn't see this at the store, I checked my receipt because we purchased an air mist room freshener that my son says wasn't packed into our shopping - the receipt shows paid but no item. Here's already 2 items over charging me at R60. The best is when you contact customer enquiries, the store phone doesn't work. Contacting the store manager is futile - How are you upholding your customer in the customer is always right? Your on site manager made me stand at your kiosk counter whilst they review camera footage for the item not packed into my bags. Then to add further insult to injury - your staff never acknowledged that the item prices were not changed on the shelves, so I can lose R60. 00 but you won't even bother to know who is the customer and why I had to come to the store to correct your staff. These errors may seem minute at store level, but there are many instore cameras and the actual person that pays your salary is saying, I am completely disgusted with their ******** intent towards paying customers, and not once apologising for these so called minute mistakes. I should not be called into your store to remind you that customer service is part and parcel of your job description, be it a complaint or compliment - it deserves preference and the priority. Shoprite would apologise with a voucher, here. I am literally saying, false advertising is NOT allowed, please don't rob, yes Rob because on that day you gained enough on your bottom line margins to have made any shortfalls for your month end.