Failure to notify customers on cancelling orders

I placed an order with these people on Jan 20 and they said my order would be delivered by Jan 22. I payed via eft and emailed my proof of payment. My order never arrived and there wasn't any word from them. So I called them today to find out why and to my surprise I found out that my order has been cancelled. Their 1st reason was that I failed to make payment then it changed to that my proof of payment was inappropriate. Kauthar said I should resend my proof of payment and she'll call me back and tell me how we'll proceed with re-placing my order or get a refund but she never got back to me. An hour later I call again and she says she can't help my order was cancelled and the things I had ordered are sold out and I could only be refunded after 7 working days. I was then put through to someone who refused to give me her name and wouldn't tell me why I wasn't notified my order was cancelled since they say this happens 2 hours after not receiving payment and I only found out when I called them. These people are sitting with my money but they telling me they can't it track unless I send my banking details again which I had already sent proof of payment. These people are the worst shem