Unreliable bank

My daughter has a PlusPlan account. She has always tried to make sure over the years that she keeps over R10k in this account to avoid the monthly management fee. For the past 2 years, there has been no pricing of the monthly management fee in the pricing brochure. Last month, she decided to use almost all of the funds in her account and thought that since there is no monthly management fee price in the brochure, no charges/fees will be charged. To her surprise R21 was deducted from her account. She is very upset.