Closing account/ issues removing account regarding now major daughter.

Many years ago I opened up bank accounts for my 3 daughters when they were all 3 minors. Today my daughter who is now 21, tries to open a bank account and she is told they can't do it as her details are still linked under my account. They say I need to go into the bank to get it removed. She then goes to work. I go into the bank, only to be told I need to go WITH my adult daughter, imagine how ridiculous that is. She asked them what happens if she didn't know where I was. They couldn't answer. I called the call center 3 times today. Is Capitec going to pay for flights and accommodation to let me sort this out? Then I said I want to rather just close my accounts, I was then told I had to do it in branch and my daughter would have to be with me for that one, so my daughter then has a say on accounts that I opened. How come other banks are able to change it when someone becomes an adult without the parent? Imagine if I was dead. Or imagine if their estranged father who hasn't seen then for 10 years openeded these accounts? So Capitec will rather lose business clearly. I will honestly never ever recommend you as a bank again, nor ever use my accounts ever again.