Appalling Customer Service

I purchased an item for R999 in September. Had to wait 2 weeks for delivery. Item did not work at all. Returned the next day. Asked for a replacement but got only a credit. Eventually got my refund on 30th November. Purchased same item again. Now they say I have not paid. I sent them their email confirming receipt of the money plus a copy of my credit card statement showing the deduction. They say that this is not sufficient and somehow I must get my bank to certify payment. Their service is terrible. There is no phone or e-mail to phone and speak to them about the problem. It never used to be this way. Their systems are faulty and it is the customer who must suffer the inconvenience and cost. You will be sorry if you buy from this bunch