Worst customer service

I have a case where my Mr D Food app was hacked and I am super unhappy about how its been handled. I had a credit on my app and when I wanted to use it, I saw that it was no longer there and an order had been made and collected in Johannesburg(I live in East London), I immediately called Mr D , my number had been changed(supposedly by the hacker) and I was told my case would be followed up on. 2 weeks went by and I thought should log on and see the progress, I had been deactivated from my account(no feedback given). I call again, and the lady said I should just use another email address and activate another account. How???? THERE IS STILL AN ISSUE OF MY ACCOUNT BEING COMPROMISED AND MY CREDIT BEING USED. THEY DECIDE TO DEACTIVATE ME WITHOUT EVEN INFORMING ME. THEIR STAFF USED THIS CREDIT AND ARE JUST COVERING IT