Account debitted without my permission and bad customer service

On Friday the 20/10/2017 I went to Standard Bank Brandwag and spoke to an Indian consultant who gave me attitude @ Enquiries , she was reluctant to assist and I went away, on Saturday morning I went to Botshabelo Branch where I was assisted with pleasure, I got a new card , an hour later R2308.68 was debited from my account, I called the called centre and I was advised that the debit is for my overdraft on my cheque account , but I didn't apply for an overdraft and the reason I stopped using my cheque account was because of the charges , how can a bank charge me R2308 for non usage for 4 months, I tried calling the call centre but they hung up on me on several occasions, so may standard please get back to me and fix this issue