Standard bank customer service

Three weeks ago I tried to withdraw money at a Standard Bank atm. Nothing was dispensed but my balance decreased. I called the Standard Bank customer service to tell them about the issue and they told me the matter should be solved by 12 March 2018. The issue was not solved, I then called again last week and was told that they would call me back to explain why I hadn't received my money back. I am still waiting for the call at this moment. I am tired of this waiting. I need to get my money back.