*****ulent transaction of miles

I logged into my bank app today fo find that someone has been using my miles to pay at Avis Morningside. I have never been to Avis Morningside in my life. I was shocked that my miles were in a negative. I contacted discovery bank this evening via their WhatsApp platform and I very disappointed in the terrible service. I still do not have a resolution from them regarding this incident and the subsequent reversal of my miles.