Bad customer service

Dischem, Ghandi Square - I honestly received the worst customer service yesterday, the 16th October 2026 from a "Customer Manager" as his badge said. I have pictures of what I'm about to say, I bought KISS nail glue, there's always a variety and I didn't go for the one I normally go for I went for the cheaper option which according to the price on the shelf was around R55, I get home I realise I was billed R119, I drove back only to be sent from this person to the next, and the customer manager when I was taken back to him for the 2nd time he said they need to refund me, the barcodes aren't the same. How as a customer, will I know barcodes?? And there was more than 1 item meaning it was their mistake, they did not even acknowledge it. On top of that they want to offer me a voucher as a form of a refund, how when what happened is due to their incompetence? Train your stuff better and it was their mistake so I indeed wanted the glue with the price I saw it with. Now they refunded back into my debit card which will take 7 business days. They honestly carried on, like the mistake wasn't due to their incompetence. I know the store is always packed and perhaps feel like you nolonger need our hard earned money but respect people and their time.