Pathetic Customer service

On Monday the 18th of January 2016 i went to the woodmead store to return my HDD due to it not working, I was helped by a lady in Customer service to which i was told they cant help me cos they found no proof of my purchase. I made this purchase on MY ACCOUNT which should mean that DIONWIRED should have a receipt on their side of this purchase. I then was told that i must go the supplier myself and get it exchanged a service that is supposed to be done by DIONWIRED. to which i called the supplier and said they need a proof of purchase, I called MR GREGORY GOVENDER where he said he would check and call me back the MONDAY to which he never!!! i called again to follow up on the Tuesday where MR GREGORY GOVENDER said he CANT HELP ME AT ALL THERE IS NO PROOF OF MY PURCHASE!!! i called headoffice to which they said there is a process to follow regarding purchases and it is possible to retrieve it - SO MR GREGORY GOVENDER YOU MUST LEARN TO DO YOUR JOB AND NOT SEND CUSTOMERS AWAY and say nothing cant be done!!!