Worse customer service

I have changed banks and being the great client that I am, I contacted telkom in April to give them my new account details to debit my account. In May 2019 they had not debited my account but chose to debit my old account, I got my statement and they charged me a debit rejection fee and this after they credited the incorrect account that has no money in. I contact them and I was notified that they will rectify the problem as they were negligent, I made a manual payment afterwards. I called them today to enquire about my new balance and to confirm if they will be debiting the correct account. My statement was still incorrect as they never fixed their error and still charging me a debit rejection fee after I had given them my new account details way in advance. If my account is debited with the incorrect amount I will be reversing that money and ignore their calls and letters as they have been ignoring my request. I am officially done with TELKOM.