What the customer sees is what the customer pays

This morning I was browsing through their website and I came across a JBL speaker whose price was R0. I ordered 3 of them and I said I'd go collect them from the store in East London. My order was approved and I got an email and an SMS confirming the order. I went to the store to collect my parcel and I was told that there was an error on the website. I believe that "What the customer sees is what the customer pays." Therefore, I want my speakers, including the other 4 that I ordered online. I even paid for shipping for the ones online.