Authorisation without a customers consent!

I wouldn’t recommend investing with African Bank after the customer service experience I’ve just had with them.
My investment was re-invested without my consent. For weeks, I had been receiving calls almost daily from different agents asking whether I wanted to re-invest, and every single time my answer was NO.
To my surprise, on the 13th of May there was no money in my account. I then went to the African Bank branch in Midrand to find out what was going on. While there, we contacted their customer service department and I was told that my phone had supposedly gone to voicemail, so the funds were automatically re-invested.
I asked them who gave authorization for that decision and when exactly my phone was on voicemail, because their agents had been calling me almost every day and I had clearly declined the re-investment offers. The consultant sounded confused and it honestly felt like a cover-up because she seemed to know exactly what had happened.
She then assured me that my money would be paid back the following day and that the process would only take 12 hours. I repeatedly asked for confirmation that I would definitely receive my funds, especially because I urgently needed the money to pay my child’s school fees. Before I could speak to the manager regarding why my funds were re-invested without my consent, the call got disconnected.
Today is Sunday and I still haven’t received my money.
I am extremely inconvenienced and frustrated, especially considering how often they experience “technical issues.” Taking a customer’s money and re-investing it without consent is very serious and feels *****ulent.
As soon as I get my money back, I’m done with African Bank.