African bank - Blocking client's account without prior notice

I would want to state categorically that banks in South Africa are really abusing power and have no respect for their client's right to the protection of personal information and right to fair treatment. My daughter realised her bank account was blocked without a prior notice from African bank when she wanted to buy food. The child was embarrassed and had to stay hungry until she arrives home later in the evening to inquire from African bank. The consultant who spoke to her said another person will phone her in 2 hours time to explain why her account was placed on hold. Until now that I am writing this complaint, my daughter's account is still blocked. She has been caused considerable inconveniences and made her to suffer a great deal of distress. This is unfair treatment and it is uncalled for.