Disgruntled and disappointed

I'm so disappointed by the service at Capitec. I went to the atm today to deposit money into my grandmother's account. Upon getting to the atm. I selected the option of paying Capitec client, then atm prompted me to insert notes. I put the money into the machine and it counted the money and gave me a slip back without prompting me for my grandmother's account number or any confirmation of her account details, only to find out that the money went went to someone's account whom I don't even know. I took the slip and shot straight to the branch at Sam Ntuli shopping complex to query and get this resolved. I got the branch and spoke to the branch manager who gave me an incident number and told me come back in 7 working days. I'm confused because I had proof of the account at which the money went to, and I had expected that steps like contacting the person whom the money went to was contacted as I was in the branch so thatthey reverse the money and give it back to me. I really don't understand that because if I have to wait 7days, what happens if the person withdraws the cash or uses the money? I was not even given the reference of the transaction, and this is really unfair as I was told that they were not authorized to so. It is really interesting on what is going to be the outcome of this, and that as a Capitec client, today's events have changed the way I view their service from a client perspective..