*****ulant transaction done by Absa!!

A transaction happened on my account for an amount of R2300,I called the Absa ***** department to enquire about this as I had not authorized any debit order for that amount and for that day The reference was also unknown to me,It turns out that Absa authorizes debit orders/journal debits from external companies on their customer's accounts without their knowledge or consent,is this even lawful?what is the purpose of debi-check or any form of transaction authorization?I am planning to take further action regarding this and discourage anyone from joining this bank,that is basically theft,I am closing all my accounts and moving to a better bank.