Clicks online website and their client service very poor

I bought an appliance from the Clicks online website. I made my payment and was informed that the product would be delivered shortly. But the next day i was informed that the product was suddenly no longer available, and i would be refunded via my Club card. I immediately requested to be refunded using my FNB account from which the payment was made. Its been almost a week, i have sent 4 emails and have called them! Ii have not received the refund, or any communication from Clicks. This is not acceptable, their online website is clearly not up to date, and their client support non existent. What can i