Unauthorized transfer from my Savings Account

An unauthorized transfer occurred from My Savings Account, I called Capitec to query the transfer as it was the only money I had left in my bank account to get me by for the month after the devastating issues I’ve been having with regards to my car. My very last R600 was taken by the collections department and whilst dealing with them I was treated in an unfair manner. I’ve been a loyal Capitec customer for years and really felt violated by the collections department. I’ve always been compliant and the audacity of the collection's agent telling me she will not reverse the R600 even though “she understands my frustration”. I even went as far as saying double debit my account and return my funds – she refused. How can Capitec collections department do this to their loyal clients. If funds are not reversed and returned to me I will consider closing my Capitec bank account. Being violated like this is really inhumane and degrading.