Violation of customers right

I'm writing this message with tears rolling down,my right as a customer are violated,money was taken out of my account yesterday as a food voucher without my knowledge,today I went to Capitec Thulamahashe and they told me that there is nothing they can do to help,I want full investigation and my 2900 as I was supposed to pay for my child's accomodation today,we trust the bank with our money and when something like this happen please advise who to trust,am so disappointed by you Capitec.