Absa credit card and collections incompetence

Short version, absa did not submit debit order, I then transferred the owed amount but was late due to absa's failure. My account went into arrears although I transferred the money, their collections were on me because I was in arrears...suddenly a double payment, the one I transfered due to absa's incompetence and another one...immediately, all the statements contradict what the collections and my banking app is telling me. On my last statement dated 21 May 2021, it shows a double payment because it did not reflect the payment I transferred after they failed. Obviously the payment showed after the issue date, hense the double payment, no...apparently that payment was late, I needed to pay another amount even though my statement and app said by 17 June, there was an immediate double payment due. To make my situation worse... apperently according to their consultant, if your Cc limit is 15k and you only use 1k, your installment is still for the full 15k and not only the 1k used. Obviously there is a lot more detail not mentioned here but the point: it is amazing how a bank makes a mistake and makes their customer pay the price...I will be closing my accounts with absa for the second time in 2 years, wonder why you are bleeding clients absa...start listening to your customers and you will start seeing how you fail them.