Incredible connection @ Menlyn, the worst customer service I've received

I went to purchase a laptop at their store for a price they displayed on their catalog. As I've purchased the laptop to see if everything is inside and nothing is damaged, I realized they gave the wrong laptop. So they go to storage and go look for the laptop I requested and now it's not the price they advertised it for. I kindly request that they give me the laptop for the price I've paid for and what they advertised for, the manager refused. So I request for a refund and now the systems refused the process for the refund and now they're telling me that it will take 10-14 working days to refund. I spent 5hours @ the store to only leave without a refund nor a laptop. Worst customer service I've ever experienced