WORST SERVICE FROM ABSA

Absa deducted an amount of R 3 504.13 - journal debit RCCS BOIS J out of my account on Friday 7 September, when I phoned them they said that I have to phone collection department Monday - when I phoned today, she couldn't give me any information about the "loan" I have with them, I must submit a query to investigate. I opened my current account last month at Absa, it still new. I don't have any idea of a student loan, never had one, but without contacting me they just took the money out of my account. It's unacceptable. She can't even give me a date that this loan was taken out, or confirm for how much. Nothing - but they can just take the funds out of my accounts??????? I need this transaction to be reversed and the funds trf back into my account.