ABSA just taking my money without consent.

I am an ABSA customer and very disappointed with the bank that is supposed to be my bank. I am in arrears with my credit card but have been paying a small amount every month. They however decided to go and deduct R 5400 from my cheque account without my permission. I see that as *****. Now they took all my money and literally the food from my mouth. If ABSA can just transfer my money as they please I would rather close my account as I cannot see that it is acceptable to transfer my funds without my permission.