Bad services

On Monday i tried to withdraw money from standard bank ATM but then the ATM gave me error message and printed out the slip with the error message and i tried lower amount which it was successfull and then i realised that i got 2 messages that says i withdraw money, meaning they deducted my money from the first time even though i did not get the cash. i called them same time and they logged the call then the problem is when i called them again today, they told me that the call was never logged properly on Monday now i have to wait untill 31 August 2017 which is too far. can someone please help me what must i do so that i can get my money back.