*****ulent transaction

In June I had a *****ulent transaction on my account which deducted R1499, I called Discovery they told me that they would open a ***** case and replace my card and that they would revert to me in 72 hours, 7 days later I called them as.i hadn't heard from them they promise to come back to me in 48 hours. I waited 10 days and I called them and I was told the person dealing with the matter would contact me within 24 hours to date still no call, no refund.