I NEED FEEDBACK ON WHAT'S GOING ON

On the 22nd May, I went to Newtown Mall to withdraw cash on Standard Bank ATM, it was not working. Then i decided to use Nedbank ATM. ATM Z689 or Terminal Number Z689. I withdraw R400 first and i didn't get it. I put the card again and withdraw R400 it came out but i got two messages that says i withdraw R400.So my other R400 was deducted on the account but i didn't get it. I went to the branch twice to log a query, no feedback no communication, I did everything they asked me to. I have ATM number, This is Standard Bank fault because their ATM was not working. Can you please contact me and tell me the feedback or how to log a query because i'm really tired now. Yesterday i called the call center and they said they will call before 15:00. They didn't call, same thing that happen when i went to the branch they said the system is slow and they will call before 15:00 PM. Went back on Tuesday and same thing happen!! If you can't get my money back is fine just let me know so that i can close this account and also save with other banks.