Cra* app cr*p support

Purchased a mobile device through the app (stock showed available at numerous stores). 3 days later I'm emailed to say that the order has been cancelled and will be refunded within 7 days. Contacted Support to ask if I can get an immediate exchange for a device in a different colour, as that showed in stock, instead of a refund and I was told to wait for the refund. Upon asking the call centre agent what guarantee do I have that the same incident (stock shows avail, pay & bash cancels due to incorrect stock) won't happen again to me if I purchase another device, the response was "we can pray". I've called various bash stores to find out availability and they have stock (same centre as the initial pick up point).