No ATM service, repeatedly.

For the second time in a few weeks, I have been unable to withdraw money at the ATM at Glenvista Shopping Centre. I receive a slip stating that my pin has been deactivated. When it first happened, I went to the Standard Bank branch at the Mall of the South, where they told me that my pin had not been deactivated and that I could withdraw money at their ATM, which I did. I thought that someone would have alerted the relevant department about the Glenvista ATM. However, when I tried to withdraw at the Glenvista ATM this morning, I received the same message: "pin deactivated". Can someone address this issue and ensure that all ATMs are available?