Money taken out of my account *******ly

I rented a car for 2 days from Hertz, park station branch. The person who assisted me is Thapelo, who was very helpful from the time of first contact until I returned the car. I fetched the car on Saturday morning and returned it on monday morning. The company took R1400 from my account as security for additional expenses. However, this morning at 03:00 my account was debited with R374.00 even though the company still has my R1400 deposit I am now sitting with an account that is in excess because I did not provide for that debit from my account as I did not give permission for hertz to take my money.

I spoke to Thapelo after I noticed that my account was debited. He told me that he was not at work. He later told me he is in the office, I explained to him that the debit will be returned unpaid. That would incur costs and a bad name for me. Why should I go through such trouble because of irresponsibility of HERTZ? Is it irresponsibility or is there someone inside the company trying to de***** me? Is it what Hertz does? *****ing from your customers?