Absa should close their doors

I have had my fair share of trouble with Absa. I am at a point of utter irritation and frustration. In the beginning of the year I ask for a settlement letter to settle my vehicle finance. Which they sent to me. I waited a while and requested one again on a Thursday and paid the amount the next Monday, within their required 5 day payment time. I dont understand why they penalize you if you pay outside this time period but nonetheless. A few months go by and I get a call to go and pick up the documents. Slow process. In August 2018 they decided to debit my account with almost R6000 as a penalty, I called them in upset asking what is happening on my account and this is their explanation. “You still owe us money so we debited your account” without my knowledge or Authority they deducted money and accused me of not paying my account. For a bank which I have been with for decades to do this, is there no more service or level of respect. No one has assisted me and or is willing to assist. The fact that they just did something ******* irritates me even more. I have paid my accounts and settled my finances, they even offered me a discount on the finance when settled and never received and was okay with that. They have worn out my patience and action must be taken. I demand Absa to rectify this mistake.