Rain check debacle

Pick N Pay Northgate store had no stock of pampers nappies on special for almost 10 days end Aug/Sept even after they said they did have and I drove 50km so I got a rain check - silly me never checked the date its written 090123 - and now a no name badge manager called Emma thinks it a January 2023 rain check - they cant check the rain check book or sequence as I suggested as it is not in the pile of mess at the customer service desk. After wasting 30 minutes of my time she advised me to come back today and chat to the GM - no I dont think so you wasting my petrol and time pushing my blood pressure up making me out to be a ***** up due to your incompetence and the actual original problem of you not having the stock and in addition how about someone answering the phone 2 hours yesterday from 10-12am *** was not answered?? let me guess you going to blame loadshedding - can someone who does not have attitude and knows it customers that keep you in business please contact me