No knowledge on in store promotion. 2 hours in store

The worst ever in retail as a whole. I got to Pick n pay around 8:10 on Saturday to catch the Smart Shopper promo. I do my shopping then head to the till points. I tell the cashier about the Johnson & Johnson promo she responds by saying it doesn't discount she called for supervisor Ziningi/ Prudence. Oooh Lord trouble started. She told me i must go back with her to where I got the item. I went and she said she doesn't know so she'll need to call Smart Shopper customer care. Which took her 25 min. I was starting to get irritated but waited. She ended the call and called help desk still i waited running late for work. When I was suppose to pay I asked Ziningi and the cashier if my Smart Shopper discount was rewarding me back as per the promotion, Ziningi made me look stupid by insisting that I didn't activate my coupons at the Kiosk instead of assisting me. She even refused to call the store manager after I asked her how can a big co. Like pick n pay have a promo and have no staff member able to implement it? Probably the manger would have back up store communication. She harshly rep**** by saying it's not about the store manager if the Smart Shopper is offline she can do anything. I was at pick n pay for full 2 hours. I left the store 10:20am. She has no management s****s, refused to call the store manager as he wasn't in, had no polite way to resolve any obsticals coming her way. Never apologised for having me wait in the store for 2 hours. I haven't set foot at pick n pay since. Then when I had to get coupon discount of: Spend R200 and get R30 back she gave me superly bad service. I told her as my items amounted to R229.79 I only have R200. Her respond was more like make a plan. She said hai keee i don't know. I really never want to deal with her. She wasn't helpful rather made my shopping experience annoying and bad. I'm highly disappointed. She walked away with a I don't care attitude. I shop at pick n pay every week, 3 days in a week. Despite i bring in R50 or R800 I should never have to be at a store for 2 hours and deal with staff who are clueless about in store promotion. Again I'm disappointed at the service and how i was treated.