Disappointed at nedbank

I'm really disappointed at nedbank. I was debited twice for my personal loan, I understand it's a man made system. I called them on the day I was debited they said it's not reflecting, I called the following day. Layla said she had reversed the money it will take 3 to 4 days to reflect I waited for more than 6 days nothing came to my account. I went to the branch I was told to come the following day as it's late and they cannot reverse. I went to the bank the following they said they cannot help me it's only the administration side that can help me. I desperately needed the money when I called i requested to speak to a supervisor she said she'll do the reversal and it will reflect the following day which was Saturday. On Saturday nothing happened Sunday still nothing when I called on Sunday they said they cannot access loans on Sunday. On Monday when I called they said the reversal is progress. When I called on Tuesday they said the is no reversal that was processed the reversal was only done Tuesday after calling numerous times. They said they cannot peak the call I made on Friday "supervisor" I'm really disappointed I haven't received my money. People **** and they were rude to me I spent a lot of money calling transferred to different departments only to find I wasn't assisted. I still haven't received my money