Poor service

I went to Capitec bank to enquire about a transaction that had happened in account. The consultant at the bank advised me to block that that account. Today I have learnt that the account that made the transaction belongs to my sister and my sister has confirmed that she was the one who had done the transaction. I have submitted all the documents required to unblock the account but I'm told that it will take up to 30days. This is so ridiculous why so long to block an account. She needs to access her funds she is varsity. Capitec bank is such a disappointment.